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https://github.com/pvvx/RTL00_WEB.git
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add crc8
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pvvx
parent
0eb18e89b8
commit
3e8794a4a3
1 changed files with 48 additions and 56 deletions
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@ -1,6 +1,6 @@
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/*
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* MLX90614drv.c
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*
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* https://esp8266.ru/forum/threads/i2c-na-rtl.2450/
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* Created on: 02/09/2017
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* Author: pvvx
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*/
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@ -91,9 +91,6 @@ typedef struct _MLX90614drv {
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#define MLX90614_I2C_BUS_CLK 50000 // The maximum frequency of the MLX90614 SMBus is 100 KHz and the minimum is 10 KHz.
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#define MLX90614_TIMER TIMER3 // используемый таймер
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//#define ReadTSF_Lo32() (*((volatile unsigned int *)(WIFI_REG_BASE + REG_TSFTR)))
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//#define ReadTSF_Hi32() (*((volatile unsigned int *)(WIFI_REG_BASE + REG_TSFTR1)))
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MLX90614DRV mlx90614drv = {
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.addr = MLX90614_I2CADDR,
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.timetik = 10000, // Время опроса таймером: 10000 us
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@ -105,31 +102,21 @@ MLX90614DRV mlx90614drv = {
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.i2c.io_sel = S0, // PC_4, PC_5
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.i2c.mode = DRV_I2C_SS_MODE // DRV_I2C_FS_MODE // DRV_I2C_HS_MODE
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};
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/*
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void mlx90614_write(unsigned char reg, unsigned short data)
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{
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PMLX90614DRV p = &mlx90614drv;
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p->buf_i2c.uc[0] = reg;
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p->buf_i2c.uc[1] = (unsigned char)((unsigned short)(data >> 8));
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p->buf_i2c.uc[2] = (unsigned char)data;
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_i2c_write(&p->i2c, p->addr, (const char *)p->buf_i2c.uc, 3, 1);
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UBaseType_t f;
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portBASE_TYPE d;
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}
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unsigned int mlx90614_read(unsigned char reg)
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{
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PMLX90614DRV p = &mlx90614drv;
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p->buf_i2c.uc[0] = reg;
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_i2c_write(&p->i2c, p->addr, (const char *)p->buf_i2c.uc, 1, 1);
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p->buf_i2c.ui = 0;
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_i2c_read(&p->i2c, p->addr, (const char *)p->buf_i2c.uc, 2, 1);
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return (p->buf_i2c.uc[0] << 8) | p->buf_i2c.uc[1];
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}
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*/
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#define i2c_reg(r) *((volatile uint32 *)(pi2c->base_regs + r))
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#define MLX90614_USE_CRC
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#ifdef MLX90614_USE_CRC
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unsigned char crc8(unsigned char x) {
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for (int i = 8; i; i--) {
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x = ( x << 1 ) ^ ( x & 128 ? 7 : 0 );
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}
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return x;
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}
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#endif
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/* Пример непрерывного чтения регистров Tobj1 и Tobj2
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* MLX90614 по прерыванию таймера */
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void mlx_tick_handler(void *par) {
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@ -146,28 +133,9 @@ void mlx_tick_handler(void *par) {
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i2c_reg(REG_DW_I2C_IC_TAR) = p->addr;
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// Enable controller.
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i2c_reg(REG_DW_I2C_IC_ENABLE) = BIT_IC_ENABLE;
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p->status = 3; // = 2;
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p->status = 2;
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break;
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case 2:
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// Заполним FIFO ic I2C командами инициализации MLX90614 ?
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/*
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// Заполним FIFO ic I2C командами чтения RAW данных
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// Write Command.
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = MLX90614_RAWIR1 | BIT_IC_DATA_CMD_RESTART;
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// Read command & data (3 bytes).
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD;
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD;
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD | BIT_IC_DATA_CMD_STOP;
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// Write Command.
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = MLX90614_RAWIR2 | BIT_IC_DATA_CMD_RESTART;
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// Read command & data (3 bytes).
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD;
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD;
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD | BIT_IC_DATA_CMD_STOP; // | BIT_IC_DATA_CMD_RESTART
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*/
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p->status = 3;
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break;
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case 4:
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case 3:
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if (i2c_reg(REG_DW_I2C_IC_RAW_INTR_STAT) & BIT_IC_RAW_INTR_STAT_TX_ABRT) {
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_CLR_INTR);
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p->errs++;
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@ -179,10 +147,26 @@ void mlx_tick_handler(void *par) {
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// Считаем готовые значения из FIFO ic I2C
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pd->o.uc[0] = i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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pd->o.uc[1] = i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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#ifdef MLX90614_USE_CRC
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// B407B5 -> 0x28 (http://crccalc.com/)
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if(crc8(pd->o.uc[1] ^ crc8(pd->o.uc[0] ^ 0x28)) != (uint8) i2c_reg(REG_DW_I2C_IC_DATA_CMD)) {
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i2c_reg(REG_DW_I2C_IC_ENABLE) = 2; // ABORT
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p->errs++;
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p->status = 0;
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break;
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}
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#endif
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pd->a.uc[0] = i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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pd->a.uc[1] = i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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#ifdef MLX90614_USE_CRC
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// B406B5 -> 0x3D (http://crccalc.com/)
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if(crc8(pd->a.uc[1] ^ crc8(pd->a.uc[0] ^ 0x3D)) != (uint8) i2c_reg(REG_DW_I2C_IC_DATA_CMD)) {
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i2c_reg(REG_DW_I2C_IC_ENABLE) = 2; // ABORT
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p->errs++;
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p->status = 0;
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break;
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}
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#endif
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if(p->buf_tx >= p->buf_idx) p->buf_tx = 0;
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else p->buf_tx++;
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if(p->buf_rx == p->buf_tx) {
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@ -191,30 +175,38 @@ void mlx_tick_handler(void *par) {
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else p->buf_rx++;
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};
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} else {
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// удаление из FIFO 6-ти байт данных
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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// удаление из FIFO блока данных
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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#ifdef MLX90614_USE_CRC
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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#endif
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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#ifdef MLX90614_USE_CRC
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(volatile uint32)i2c_reg(REG_DW_I2C_IC_DATA_CMD);
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#endif
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};
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}
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case 3:
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case 2:
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// Заполним FIFO ic I2C командами чтения
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// Write Command.
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = MLX90614_TOBJ1; // | BIT_IC_DATA_CMD_RESTART;
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = MLX90614_TOBJ1;
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// Read command & data (3 bytes).
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD | BIT_IC_DATA_CMD_RESTART;
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#ifdef MLX90614_USE_CRC
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD;
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#endif
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD | BIT_IC_DATA_CMD_STOP;
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// Write Command.
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = MLX90614_TA; // | BIT_IC_DATA_CMD_RESTART;
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = MLX90614_TA;
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// Read command & data (3 bytes).
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD | BIT_IC_DATA_CMD_RESTART;
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#ifdef MLX90614_USE_CRC
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD;
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD | BIT_IC_DATA_CMD_STOP; // | BIT_IC_DATA_CMD_RESTART
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p->status = 4;
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#endif
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i2c_reg(REG_DW_I2C_IC_DATA_CMD) = BIT_IC_DATA_CMD_CMD | BIT_IC_DATA_CMD_STOP;
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p->status = 3;
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break;
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}
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}
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