Initial shtc3 TWI/I2C implementation

Weirdly, it only works ~1/5 of the time.

code/b-parasite/Makefile

@@ -42,11 +42,13 @@ SRC_FILES += \
   $(SDK_ROOT)/modules/nrfx/mdk/system_nrf52840.c \
   $(SDK_ROOT)/components/boards/boards.c \
   $(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_clock.c \
+  $(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_twi.c \
   $(SDK_ROOT)/integration/nrfx/legacy/nrf_drv_uart.c \
   $(SDK_ROOT)/modules/nrfx/soc/nrfx_atomic.c \
   $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_clock.c \
   $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_gpiote.c \
   $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_rtc.c \
+  $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_twi.c \
   $(SDK_ROOT)/modules/nrfx/drivers/src/prs/nrfx_prs.c \
   $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_pwm.c \
   $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_uart.c \
@@ -65,6 +67,7 @@ SRC_FILES += \
 	$(PROJ_DIR)/prst/ble.c \
 	$(PROJ_DIR)/prst/pwm.c \
 	$(PROJ_DIR)/prst/rtc.c \
+	$(PROJ_DIR)/prst/shtc3.c \
 
 # Include folders common to all targets
 INC_FOLDERS += \

code/b-parasite/config/sdk_config.h

@@ -4289,13 +4289,13 @@
 // <e> NRFX_TWI_ENABLED - nrfx_twi - TWI peripheral driver
 //==========================================================
 #ifndef NRFX_TWI_ENABLED
-#define NRFX_TWI_ENABLED 0
+#define NRFX_TWI_ENABLED 1
 #endif
 // <q> NRFX_TWI0_ENABLED  - Enable TWI0 instance
 
 
 #ifndef NRFX_TWI0_ENABLED
-#define NRFX_TWI0_ENABLED 0
+#define NRFX_TWI0_ENABLED 1
 #endif
 
 // <q> NRFX_TWI1_ENABLED  - Enable TWI1 instance
@@ -4340,7 +4340,7 @@
 // <e> NRFX_TWI_CONFIG_LOG_ENABLED - Enables logging in the module.
 //==========================================================
 #ifndef NRFX_TWI_CONFIG_LOG_ENABLED
-#define NRFX_TWI_CONFIG_LOG_ENABLED 0
+#define NRFX_TWI_CONFIG_LOG_ENABLED 1
 #endif
 // <o> NRFX_TWI_CONFIG_LOG_LEVEL  - Default Severity level
 
@@ -5806,7 +5806,7 @@
 // <e> TWI_ENABLED - nrf_drv_twi - TWI/TWIM peripheral driver - legacy layer
 //==========================================================
 #ifndef TWI_ENABLED
-#define TWI_ENABLED 0
+#define TWI_ENABLED 1
 #endif
 // <o> TWI_DEFAULT_CONFIG_FREQUENCY  - Frequency
 
@@ -5852,12 +5852,13 @@
 // <e> TWI0_ENABLED - Enable TWI0 instance
 //==========================================================
 #ifndef TWI0_ENABLED
-#define TWI0_ENABLED 0
+#define TWI0_ENABLED 1
 #endif
 // <q> TWI0_USE_EASY_DMA  - Use EasyDMA (if present)
 
 
 #ifndef TWI0_USE_EASY_DMA
+// #define TWI0_USE_EASY_DMA 1
 #define TWI0_USE_EASY_DMA 0
 #endif
 
@@ -8944,7 +8945,7 @@
 // <e> TWI_CONFIG_LOG_ENABLED - Enables logging in the module.
 //==========================================================
 #ifndef TWI_CONFIG_LOG_ENABLED
-#define TWI_CONFIG_LOG_ENABLED 0
+#define TWI_CONFIG_LOG_ENABLED 1
 #endif
 // <o> TWI_CONFIG_LOG_LEVEL  - Default Severity level
 

code/b-parasite/src/main.c

@@ -18,7 +18,7 @@
 #include "prst/ble.h"
 #include "prst/pwm.h"
 #include "prst/rtc.h"
-
+#include "prst/shtc3.h"
 #include "prst_config.h"
 
 #define DEAD_BEEF 0xDEADBEEF
@@ -77,8 +77,11 @@ int main(void) {
   power_management_init();
   prst_ble_init();
 
+  prst_sht3c_init();
   prst_rtc_set_callback(rtc_callback);
-  prst_rtc_init();
+  NRF_LOG_FLUSH();
+  // UNUSED_VARIABLE(prst_rtc_init());
+  UNUSED_VARIABLE(prst_rtc_init));
 
   for (;;) {
     power_manage();

code/b-parasite/src/prst/shtc3.c

@@ -0,0 +1,48 @@
+#include "prst/shtc3.h"
+
+#include <app_error.h>
+#include <nrf_delay.h>
+#include <nrf_drv_twi.h>
+#include <nrf_gpio.h>
+#include <nrf_log.h>
+
+// #define PRST_SHT3C_DEFAULT_ADDR 0x70
+#define PRST_SHT3C_DEFAULT_ADDR 0x44
+
+static const nrf_drv_twi_t twi_ = NRF_DRV_TWI_INSTANCE(0);
+
+static uint8_t buff[6];
+static uint8_t tx_data[] = {0x2c, 0x06};
+
+void prst_sht3c_init() {
+  nrf_drv_twi_config_t twi_config = NRF_DRV_TWI_DEFAULT_CONFIG;
+  twi_config.scl = NRF_GPIO_PIN_MAP(0, 3);
+  twi_config.sda = NRF_GPIO_PIN_MAP(0, 28);
+  // twi_config.clear_bus_init = true;
+  twi_config.frequency = NRF_TWI_FREQ_400K;
+
+  uint32_t err_code;
+  // uint8_t tx_data[] = {0x2c, 0x06};
+  err_code = nrf_drv_twi_init(&twi_, &twi_config, NULL, NULL);
+  APP_ERROR_CHECK(err_code);
+  nrf_drv_twi_enable(&twi_);
+  nrf_delay_ms(10);
+  err_code = nrf_drv_twi_tx(&twi_, PRST_SHT3C_DEFAULT_ADDR, tx_data,
+                            sizeof(tx_data), true);
+  APP_ERROR_CHECK(err_code);
+
+  nrf_delay_ms(10);
+
+  NRF_LOG_INFO("WILL READ DATA:");
+  err_code = nrf_drv_twi_rx(&twi_, PRST_SHT3C_DEFAULT_ADDR, buff, 6);
+  NRF_LOG_INFO("OH NO!");
+  APP_ERROR_CHECK(err_code);
+
+  NRF_LOG_INFO("READ DATA: \n");
+  for (int i = 0; i < 6; i++) {
+    NRF_LOG_INFO("0x%d ", buff[i]);
+  }
+  NRF_LOG_INFO("Okay. \n");
+}
+
+void prst_sht3c_read();

code/b-parasite/src/prst/shtc3.h

@@ -0,0 +1,10 @@
+#ifndef _PRST_SHT3C_H_
+#define _PRST_SHT3C_H_
+
+typedef struct prst_sht3c_read {
+} prst_sh3c_read_t;
+
+void prst_sht3c_init();
+void prst_sht3c_read();
+
+#endif  // _PRST_SHT3C_H_