uart.h: Add uart_get_baud/uart_set_baud functions, change default baud rate from 74906 to 115200

core/app_main.c

@@ -16,8 +16,8 @@
 #include "common_macros.h"
 #include "xtensa_ops.h"
 #include "esp/rom.h"
+#include "esp/uart.h"
 #include "esp/iomux_regs.h"
-#include "esp/uart_regs.h"
 #include "esp/spi_regs.h"
 #include "esp/dport_regs.h"
 #include "esp/wdev_regs.h"
@@ -30,7 +30,6 @@
 
 void user_init(void);
 
-#define UART_DIVISOR 1068  // 74906 bps (yeah, I don't understand it either)
 #define BOOT_INFO_SIZE 28
 //TODO: phy_info should probably be a struct (no idea about its organization, though)
 #define PHY_INFO_SIZE 128
@@ -293,8 +292,8 @@ static void init_networking(uint8_t *phy_info, uint8_t *mac_addr) {
         printf("FATAL: sdk_register_chipv6_phy failed");
         halt();
     }
-    sdk_uart_div_modify(0, UART_DIVISOR);
-    sdk_uart_div_modify(1, UART_DIVISOR);
+    uart_set_baud(0, 115200);
+    uart_set_baud(1, 115200);
     sdk_phy_disable_agc();
     sdk_ieee80211_phy_init(sdk_g_ic.s.phy_mode);
     sdk_lmacInit();

core/include/esp/uart.h

@@ -11,6 +11,7 @@
 
 #include "esp/types.h"
 #include "esp/uart_regs.h"
+#include "esp/clocks.h"
 
 #define UART_FIFO_MAX 127
 
@@ -110,4 +111,17 @@ static inline void uart_flush_rxfifo(int uart_num) {
     uart_clear_rxfifo(uart_num);
 }
 
+/* Set uart baud rate to the desired value */
+static inline void uart_set_baud(int uart_num, int bps)
+{
+    uint32_t divider = APB_CLK_FREQ / bps;
+    UART(uart_num).CLOCK_DIVIDER = divider;
+}
+
+/* Returns the current baud rate for the UART */
+static inline int uart_get_baud(int uart_num)
+{
+    return APB_CLK_FREQ / FIELD2VAL(UART_CLOCK_DIVIDER_VALUE, UART(uart_num).CLOCK_DIVIDER);
+}
+
 #endif /* _ESP_UART_H */

examples/blink/blink.c

@@ -3,7 +3,6 @@
  * This sample code is in the public domain.
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "esp8266.h"
@@ -53,7 +52,6 @@ void blinkenRegisterTask(void *pvParameters)
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
     xTaskCreate(blinkenTask, (signed char *)"blinkenTask", 256, NULL, 2, NULL);
     //xTaskCreate(blinkenRegisterTask, (signed char *)"blinkenRegisterTask", 256, NULL, 2, NULL);
 }

examples/blink_timers/blink_timers.c

@@ -3,7 +3,6 @@
  * This sample code is in the public domain.
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "esp8266.h"
@@ -33,8 +32,6 @@ void frc2_interrupt_handler(void)
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
-
     /* configure GPIOs */
     gpio_enable(gpio_frc1, GPIO_OUTPUT);
     gpio_enable(gpio_frc2, GPIO_OUTPUT);

examples/bmp180_i2c/bmp180_i2c.c

@@ -3,7 +3,6 @@
  * This sample code is in the public domain.
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 
 #include "FreeRTOS.h"
 #include "task.h"
@@ -83,22 +82,9 @@ void bmp180_task(void *pvParameters)
     }
 }
 
-// Setup HW
-void user_setup(void)
-{
-    // Set UART Parameter
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
-
-    // Give the UART some time to settle
-    sdk_os_delay_us(500);
-}
-
 void user_init(void)
 {
-    // Setup HW
-    user_setup();
-
-    // Just some infomations
+    // Just some informations
     printf("\n");
     printf("SDK version : %s\n", sdk_system_get_sdk_version());
     printf("GIT version : %s\n", GITSHORTREV);

examples/button/button.c

@@ -6,7 +6,6 @@
  * This sample code is in the public domain.
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "queue.h"
@@ -75,7 +74,6 @@ void GPIO_HANDLER(void)
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
     gpio_enable(gpio, GPIO_INPUT);
 
     tsqueue = xQueueCreate(2, sizeof(uint32_t));

examples/cpp_01_tasks/cpp_tasks.cpp

@@ -94,8 +94,6 @@ esp_open_rtos::thread::queue_t<uint32_t> MyQueue;
  */
 extern "C" void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
-	
     MyQueue.queue_create(10);
     
     task_1.queue = MyQueue;

examples/experiments/timers/timers.c

@@ -7,7 +7,6 @@
  * This experimental reverse engineering code is in the public domain.
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "esp8266.h"
@@ -118,7 +117,6 @@ void frc2_handler(void)
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
     xTaskCreate(timerRegTask, (signed char *)"timerRegTask", 1024, NULL, 2, NULL);
 
     TIMER(0).CTRL = VAL2FIELD(TIMER_CTRL_CLKDIV, TIMER_CLKDIV_256) | TIMER_CTRL_RELOAD;

examples/experiments/unaligned_load/unaligned_load.c

@@ -3,7 +3,6 @@
 #include "esp/rom.h"
 #include "esp/timer.h"
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "queue.h"
@@ -214,8 +213,6 @@ void sanity_tests(void);
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
-
     gpio_enable(2, GPIO_OUTPUT); /* used for LED debug */
     gpio_write(2, 1); /* active low */
 

examples/http_get/http_get.c

@@ -114,7 +114,6 @@ void http_get_task(void *pvParameters)
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
     printf("SDK version:%s\n", sdk_system_get_sdk_version());
 
     struct sdk_station_config config = {

examples/http_get_mbedtls/http_get_mbedtls.c

@@ -331,7 +331,6 @@ void http_get_task(void *pvParameters)
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
     printf("SDK version:%s\n", sdk_system_get_sdk_version());
 
     struct sdk_station_config config = {

examples/ota_basic/ota_basic.c

@@ -7,7 +7,6 @@
  * NOT SUITABLE TO PUT ON THE INTERNET OR INTO A PRODUCTION ENVIRONMENT!!!!
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "esp8266.h"
@@ -18,8 +17,6 @@
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
-
     rboot_config_t conf = rboot_get_config();
     printf("\r\n\r\nOTA Basic demo.\r\nCurrently running on flash slot %d / %d.\r\n\r\n",
            conf.current_rom, conf.count);

examples/simple/simple.c

@@ -1,7 +1,6 @@
 /* Very basic example that just demonstrates we can run at all!
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "queue.h"
@@ -36,7 +35,6 @@ static xQueueHandle mainqueue;
 
 void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
     printf("SDK version:%s\n", sdk_system_get_sdk_version());
     mainqueue = xQueueCreate(10, sizeof(uint32_t));
     xTaskCreate(task1, (signed char *)"tsk1", 256, &mainqueue, 2, NULL);

examples/simple_cplusplus/simple.cpp

@@ -3,7 +3,6 @@
    This sample code is in the public domain.
  */
 #include "espressif/esp_common.h"
-#include "espressif/sdk_private.h"
 #include "FreeRTOS.h"
 #include "task.h"
 #include "queue.h"
@@ -58,7 +57,6 @@ void task1(void *pvParameters)
 
 extern "C" void user_init(void)
 {
-    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
     printf("SDK version:%s\n", sdk_system_get_sdk_version());
     xTaskCreate(task1, (signed char *)"tsk1", 256, NULL, 2, NULL);
 }