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https://github.com/taubel/sdk-ameba-v4.0b-gcc.git
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initial commit
This commit is contained in:
Tautvydas Belgeras
commit
60a7afcc83
2528 changed files with 1001987 additions and 0 deletions
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.PHONY: all copy clean
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#*****************************************************************************#
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# Source FILE LIST #
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#*****************************************************************************#
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CSRC = src inc
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#*****************************************************************************#
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# RULES TO GENERATE TARGETS #
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#*****************************************************************************#
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# Define the Rules to build the core targets
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all: copy
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copy:
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for cpf in $(CSRC); do \
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cp -rf $$cpf ../..; \
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done
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sleep 10 sec. to wait for UART console
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start i2c example - SHTC1
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SHTC1_Init
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i2c_sel:1000
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i2c_idx:0
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RTL8195A[HAL]: ISR 0 didb't bee register!!!
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SHTC1 init ok, id=0x87
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temp=26.160507, humidity=40.524292, error=0
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temp=26.125793, humidity=40.444946, error=0
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temp=26.109772, humidity=40.370178, error=0
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...
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Example Description
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This example describes how to use i2c by using mbed api
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work with arduino extended board, which has SHTC1 temperature and humidity
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sensor
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Connect
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- I2C0 SDA (PA_19) to extended board's SDA
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- I2C0 SCL (PA_22) to extended board's SCL
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include $(MAKE_INCLUDE_GEN)
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#include ./Makefile.inc
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.PHONY: all clean
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CHIP = rtl8195a
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HALINCDIR = realtek/v3_0/include
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MODULE_IFLAGS += -I$(shell pwd -L)/../inc
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MODULE_IFLAGS += -I$(SWLIBDIR)/api
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MODULE_IFLAGS += -I$(SWLIBDIR)/api/mbed/hal/
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MODULE_IFLAGS += -I$(SWLIBDIR)/api/mbed/api/
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MODULE_IFLAGS += -I$(SWLIBDIR)/drivers/targets/cmsis/rtl8195a/
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MODULE_IFLAGS += -I$(SWLIBDIR)/drivers/targets/hal/rtl8195a/
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GLOBAL_CFLAGS += -DCONFIG_PLATFORM_8195A
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#*****************************************************************************#
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# Source FILE LIST #
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#*****************************************************************************#
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CSRC += main.c
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#*****************************************************************************#
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# Object FILE LIST #
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#*****************************************************************************#
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OBJS = $(CSRC:.c=.o)
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#*****************************************************************************#
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# Object FILE LIST #
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#*****************************************************************************#
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#OBJS = monitor.o rtl_consol.o
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#*****************************************************************************#
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# RULES TO GENERATE TARGETS #
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#*****************************************************************************#
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# Define the Rules to build the core targets
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all: CORE_TARGETS COPY_RAM_OBJS
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#*****************************************************************************#
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# GENERATE OBJECT FILE
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#*****************************************************************************#
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CORE_TARGETS: $(OBJS)
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#*****************************************************************************#
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# GENERATE OBJECT FILE
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#*****************************************************************************#
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clean:
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rm -f $(CSRC:.c=.o) $(CSRC:.c=.d) $(CSRC:.c=.i) $(CSRC:.c=.s)
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#include "device.h"
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#include "PinNames.h"
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#include "basic_types.h"
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#include "diag.h"
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#include "i2c_api.h"
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#include "pinmap.h"
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#include "rtl_lib.h"
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/*I2C pin location:
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* I2C0:
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* - S0: PA_1(SCL)/PA_4(SDA).
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* - S1: PA_22(SCL)/PA_19(SDA).
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* - S2: PA_29(SCL)/PA_30(SDA).
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*
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* I2C1:
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* - S0: PA_3(SCL)/PA_2(SDA).
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* - S1: PA_18(SCL)/PA_23(SDA).
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* - S2: PA_28(SCL)/PA_27(SDA).
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*/
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#define NO_ERROR 0x00
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#define ACK_ERROR 0x01
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#define CHECKSUM_ERROR 0x02
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#define NULL_ERROR 0x03
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#define MBED_I2C_MTR_SDA PA_19
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#define MBED_I2C_MTR_SCL PA_22
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#define MBED_I2C_SLAVE_ADDR0 0x70
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#define POLYNOMIAL 0x131 // P(x) = x^8 + x^5 + x^4 + 1 = 100110001
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#define MBED_I2C_BUS_CLK 100000 //hz
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#define I2C_DATA_MAX_LENGTH 16
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uint8_t i2cdata_write[I2C_DATA_MAX_LENGTH];
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uint8_t i2cdata_read[I2C_DATA_MAX_LENGTH];
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int i2cdata_read_pos;
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volatile i2c_t i2cmaster;
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// Sensor Commands
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#define READ_ID 0xEFC8 // command: read ID register
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#define SOFT_RESET 0x805D // soft resetSample Code for SHTC1
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#define MEAS_T_RH_POLLING 0x7866 // meas. read T first, clock stretching disabled
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#define MEAS_T_RH_CLOCKSTR 0x7CA2 // meas. read T first, clock stretching enabled
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#define MEAS_RH_T_POLLING 0x58E0 // meas. read RH first, clock stretching disabled
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#define MEAS_RH_T_CLOCKSTR 0x5C24 // meas. read RH first, clock stretching enabled
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static int SHTC1_GetID(uint16_t *id);
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static void SHTC1_WriteCommand(uint16_t cmd);
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static int SHTC1_Read2BytesAndCrc(uint16_t *data);
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static int SHTC1_CheckCrc(uint8_t data[], uint8_t nbrOfBytes, uint8_t checksum);
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static float SHTC1_CalcTemperature(uint16_t rawValue);
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static float SHTC1_CalcHumidity(uint16_t rawValue);
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int SHTC1_Init(uint16_t *pID)
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{
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int error = NO_ERROR;
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DiagPrintf("SHTC1_Init \r\n");
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i2c_init((i2c_t*)&i2cmaster, MBED_I2C_MTR_SDA ,MBED_I2C_MTR_SCL);
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i2c_frequency((i2c_t*)&i2cmaster,MBED_I2C_BUS_CLK);
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if (pID == NULL ) return NULL_ERROR;
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error = SHTC1_GetID(pID);
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return error;
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}
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static int SHTC1_GetID(uint16_t *id)
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{
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int error = NO_ERROR;
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uint8_t bytes[2];
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uint8_t checksum;
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SHTC1_WriteCommand(READ_ID);
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i2c_read((i2c_t*)&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[0], 3, 1);
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i2cdata_read_pos = 0;
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error = SHTC1_Read2BytesAndCrc(id);
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return error;
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}
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static int SHTC1_Read2BytesAndCrc(uint16_t *data)
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{
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int error;
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int readed;
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uint8_t bytes[2];
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uint8_t checksum;
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bytes[0] = i2cdata_read[i2cdata_read_pos++];
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bytes[1] = i2cdata_read[i2cdata_read_pos++];
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checksum = i2cdata_read[i2cdata_read_pos++];
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error = SHTC1_CheckCrc(bytes, 2, checksum);
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*data = (bytes[0] << 8) | bytes[1];
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return error;
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}
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static int SHTC1_CheckCrc(uint8_t data[], uint8_t nbrOfBytes, uint8_t checksum)
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{
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uint8_t bit; // bit mask
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uint8_t crc = 0xFF; // calculated checksum
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uint8_t byteCtr; // byte counter
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// calculates 8-Bit checksum with given polynomial
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for(byteCtr = 0; byteCtr < nbrOfBytes; byteCtr++)
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{
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crc ^= (data[byteCtr]);
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for(bit = 8; bit > 0; --bit)
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{
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if(crc & 0x80) crc = (crc << 1) ^ POLYNOMIAL;
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else crc = (crc << 1);
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}
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}
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// verify checksum
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if(crc != checksum) return CHECKSUM_ERROR;
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else return NO_ERROR;
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}
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static void SHTC1_WriteCommand(uint16_t cmd)
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{
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int writebytes;
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i2cdata_write[0] = (uint8_t)(cmd >>8);
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i2cdata_write[1] = (uint8_t)(cmd&0xFF);
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i2c_write((i2c_t*)&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdata_write[0], 2, 1);
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}
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static float SHTC1_CalcTemperature(uint16_t rawValue)
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{
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return 175.0 * (float)rawValue / 65536.0 - 45.0;
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}
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static float SHTC1_CalcHumidity(uint16_t rawValue)
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{
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return 100.0 * (float)rawValue / 65536.0;
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}
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int SHTC1_GetTempAndHumi(float *temp, float *humi)
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{
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int error;
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uint16_t rawValueTemp;
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uint16_t rawValueHumi;
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SHTC1_WriteCommand(MEAS_T_RH_CLOCKSTR);
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//Wire1.requestFrom(I2C_ADR_SHTC1, 6);
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i2c_read((i2c_t*)&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[0], 6, 1);
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i2cdata_read_pos = 0;
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error = NO_ERROR;
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error |= SHTC1_Read2BytesAndCrc(&rawValueTemp);
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error |= SHTC1_Read2BytesAndCrc(&rawValueHumi);
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//diag_printf("raw temp=0x%x, raw humidity=0x%x, error=%d\n",
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// rawValueTemp, rawValueHumi, error);
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if ( error == NO_ERROR ) {
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*temp = SHTC1_CalcTemperature(rawValueTemp);
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*humi = SHTC1_CalcHumidity(rawValueHumi);
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}
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return error;
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}
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void main(void)
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{
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//gpio_t gpio_led;
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int led_status;
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int i2clocalcnt;
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int error;
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uint16_t shtc1_id;
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float temperature = 1.123f;
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float humidity = 2.456f;
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DBG_8195A("sleep 10 sec. to wait for UART console\n");
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DelayMs(10000);
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DBG_8195A("start i2c example - SHTC1\n");
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error = SHTC1_Init(&shtc1_id);
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if ( error == NO_ERROR ) {
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DiagPrintf("SHTC1 init ok, id=0x%x\r\n", shtc1_id);
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} else {
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DiagPrintf("SHTC1 init FAILED! \r\n");
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for(;;);
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}
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while(1){
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error = SHTC1_GetTempAndHumi(&temperature, &humidity);
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rtl_printf("temp=%f, humidity=%f, error=%d\n",
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temperature, humidity, error);
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DelayMs(1000);
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}
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}
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