add external temperature sensor support, allow to cycle through different test modes

Core/Inc/dht11.h

@@ -1,30 +0,0 @@
-#ifndef __DHT11
-#define __DHT11
-
-#define SKIP_LOW while (!(GPIOD->IDR & 0x0800)) {}
-#define SKIP_HIGH while (GPIOD->IDR & 0x0800) {}
-
-#define FILL_REGISTER do { \
-	for (int i = 0; i < 8; i++) { \
-		read_register <<= 1; \
-		SKIP_LOW; \
-		read_register |= dht11_measure_high_duration(); \
-	} } while (0)
-
-struct SysTickConfig {
-	uint32_t ctrl;
-	uint32_t load;
-	uint32_t val;
-};
-
-struct DHT11_Data {
-	uint8_t humid_integral;
-	uint8_t humid_decimal;
-	uint8_t temp_integral;
-	uint8_t temp_decimal;
-	uint8_t crc;
-};
-
-void dht11_show_both(void);
-
-#endif

Core/Src/dht11.c

@@ -1,101 +0,0 @@
-#include "main.h"
-#include "generic_macros.h"
-#include "dht11.h"
-
-static struct SysTickConfig stc;
-static uint32_t *systick_base = (uint32_t *) SysTick_BASE;
-
-static void wait(uint32_t wait_us)
-{
-	int target_time = *(systick_base+8);
-	target_time -= wait_us << 4;
-
-	while (*(systick_base+8) > target_time) {}
-}
-
-static void dht11_save_systick_state(void)
-{
-	stc.ctrl = *(systick_base + 0);
-	stc.load = *(systick_base + 4);
-	stc.val  = *(systick_base + 8);
-}
-
-static void dht11_load_systick_state(void)
-{
-	*(systick_base + 4) = stc.load;
-	*(systick_base + 8) = stc.val;
-	*(systick_base + 0) = stc.ctrl;
-}
-
-static void dht11_init_systick(void)
-{
-	dht11_save_systick_state();
-
-	*(systick_base + 0) = 0x5;      // disable /8 prescaler, no interrupts, enable counting
-	*(systick_base + 4) = 0xFFFFFF; // load largest possible value
-
-	// verify value load
-	if (*(systick_base + 8) == 0)
-		PANIC(0x4000);
-}
-
-static size_t dht11_measure_high_duration(void)
-{
-	int current_time = *(systick_base+8);
-	SKIP_HIGH;
-
-	// elapsed_time > 49us ? 1 : 0
-	return (current_time - *(systick_base+8)) > (49 << 4);
-}
-
-static void dht11_read_value(struct DHT11_Data *data)
-{
-	dht11_init_systick();
-
-	register uint8_t read_register = 0;
-
-	GPIOD->BSRR = GPIO_PIN_11;       // enable DHT11
-	wait(50000);                     // hold HIGH for 50 ms
-	GPIOD->BSRR = GPIO_PIN_11 << 16; // start signal
-	wait(30000);                     // hold it for 30 ms
-	GPIOD->BSRR = GPIO_PIN_11;       // pull up, DHT will now take control over the connection
-
-	// switch GPIOD 11 to input mode
-	GPIOD->MODER &= 0xFF3FFFFF;
-
-	// read transmission start sequence from DHT11
-	SKIP_HIGH;
-	SKIP_LOW;
-	SKIP_HIGH;
-
-	// read humidity integral
-	FILL_REGISTER;
-	data->humid_integral = read_register;
-
-	// read humidity decimal
-	FILL_REGISTER;
-	data->humid_decimal = read_register;
-
-	// read temperature integral
-	FILL_REGISTER;
-	data->temp_integral = read_register;
-
-	// read temperature decimal
-	FILL_REGISTER;
-	data->temp_decimal = read_register;
-
-	// read crc
-	FILL_REGISTER;
-	data->crc = read_register;
-
-	// switch GPIOD 11 back to output mode
-	GPIOD->MODER |= 0x00900000;
-
-	dht11_load_systick_state();
-}
-
-void dht11_show_both(void)
-{
-	struct DHT11_Data data;
-	dht11_read_value(&data);
-}

Core/Src/main.c

@@ -25,7 +25,6 @@
 #include "generic_macros.h"
 #include "lcd.h"
 #include "external_temp.h"
-#include "dht11.h"
 
 /* USER CODE END Includes */
 
@@ -50,7 +49,6 @@ ADC_HandleTypeDef hadc1;
 /* USER CODE BEGIN PV */
 
 void ((*executors[])(void)) = {
-		dht11_show_both,
 		external_temp_show_celsius,
 		external_temp_show_fahrenheit
 };
@@ -106,7 +104,6 @@ int main(void)
 
   GPIOD->ODR = 0xF000;
   display_init();
-  HAL_Delay(1000);
   GPIOD->ODR = 0x0000;
 
   /* USER CODE END 2 */
@@ -239,8 +236,7 @@ static void MX_GPIO_Init(void)
                           |GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15, GPIO_PIN_RESET);
 
   /*Configure GPIO pin Output Level */
-  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14
+  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15, GPIO_PIN_RESET);
-                          |GPIO_PIN_15, GPIO_PIN_RESET);
 
   /*Configure GPIO pin : PA0 */
   GPIO_InitStruct.Pin = GPIO_PIN_0;
@@ -257,10 +253,8 @@ static void MX_GPIO_Init(void)
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
   HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
 
-  /*Configure GPIO pins : PD11 PD12 PD13 PD14
+  /*Configure GPIO pins : PD12 PD13 PD14 PD15 */
-                           PD15 */
+  GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
-  GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14
-                          |GPIO_PIN_15;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

Debug/Core/Src/subdir.mk

@@ -5,7 +5,6 @@
 
 # Add inputs and outputs from these tool invocations to the build variables 
 C_SRCS += \
-../Core/Src/dht11.c \
 ../Core/Src/external-temperature.c \
 ../Core/Src/external_temp.c \
 ../Core/Src/lcd.c \
@@ -17,7 +16,6 @@ C_SRCS += \
 ../Core/Src/system_stm32f4xx.c 
 
 OBJS += \
-./Core/Src/dht11.o \
 ./Core/Src/external-temperature.o \
 ./Core/Src/external_temp.o \
 ./Core/Src/lcd.o \
@@ -29,7 +27,6 @@ OBJS += \
 ./Core/Src/system_stm32f4xx.o 
 
 C_DEPS += \
-./Core/Src/dht11.d \
 ./Core/Src/external-temperature.d \
 ./Core/Src/external_temp.d \
 ./Core/Src/lcd.d \
@@ -48,7 +45,7 @@ Core/Src/%.o Core/Src/%.su Core/Src/%.cyclo: ../Core/Src/%.c Core/Src/subdir.mk
 clean: clean-Core-2f-Src
 
 clean-Core-2f-Src:
-	-$(RM) ./Core/Src/dht11.cyclo ./Core/Src/dht11.d ./Core/Src/dht11.o ./Core/Src/dht11.su ./Core/Src/external-temperature.cyclo ./Core/Src/external-temperature.d ./Core/Src/external-temperature.o ./Core/Src/external-temperature.su ./Core/Src/external_temp.cyclo ./Core/Src/external_temp.d ./Core/Src/external_temp.o ./Core/Src/external_temp.su ./Core/Src/lcd.cyclo ./Core/Src/lcd.d ./Core/Src/lcd.o ./Core/Src/lcd.su ./Core/Src/main.cyclo ./Core/Src/main.d ./Core/Src/main.o ./Core/Src/main.su ./Core/Src/stm32f4xx_hal_msp.cyclo ./Core/Src/stm32f4xx_hal_msp.d ./Core/Src/stm32f4xx_hal_msp.o ./Core/Src/stm32f4xx_hal_msp.su ./Core/Src/stm32f4xx_it.cyclo ./Core/Src/stm32f4xx_it.d ./Core/Src/stm32f4xx_it.o ./Core/Src/stm32f4xx_it.su ./Core/Src/syscalls.cyclo ./Core/Src/syscalls.d ./Core/Src/syscalls.o ./Core/Src/syscalls.su ./Core/Src/sysmem.cyclo ./Core/Src/sysmem.d ./Core/Src/sysmem.o ./Core/Src/sysmem.su ./Core/Src/system_stm32f4xx.cyclo ./Core/Src/system_stm32f4xx.d ./Core/Src/system_stm32f4xx.o ./Core/Src/system_stm32f4xx.su
+	-$(RM) ./Core/Src/external-temperature.cyclo ./Core/Src/external-temperature.d ./Core/Src/external-temperature.o ./Core/Src/external-temperature.su ./Core/Src/external_temp.cyclo ./Core/Src/external_temp.d ./Core/Src/external_temp.o ./Core/Src/external_temp.su ./Core/Src/lcd.cyclo ./Core/Src/lcd.d ./Core/Src/lcd.o ./Core/Src/lcd.su ./Core/Src/main.cyclo ./Core/Src/main.d ./Core/Src/main.o ./Core/Src/main.su ./Core/Src/stm32f4xx_hal_msp.cyclo ./Core/Src/stm32f4xx_hal_msp.d ./Core/Src/stm32f4xx_hal_msp.o ./Core/Src/stm32f4xx_hal_msp.su ./Core/Src/stm32f4xx_it.cyclo ./Core/Src/stm32f4xx_it.d ./Core/Src/stm32f4xx_it.o ./Core/Src/stm32f4xx_it.su ./Core/Src/syscalls.cyclo ./Core/Src/syscalls.d ./Core/Src/syscalls.o ./Core/Src/syscalls.su ./Core/Src/sysmem.cyclo ./Core/Src/sysmem.d ./Core/Src/sysmem.o ./Core/Src/sysmem.su ./Core/Src/system_stm32f4xx.cyclo ./Core/Src/system_stm32f4xx.d ./Core/Src/system_stm32f4xx.o ./Core/Src/system_stm32f4xx.su
 
 .PHONY: clean-Core-2f-Src
 

Debug/objects.list

@@ -1,4 +1,3 @@
-"./Core/Src/dht11.o"
 "./Core/Src/external-temperature.o"
 "./Core/Src/external_temp.o"
 "./Core/Src/lcd.o"

test1.ioc

@@ -24,11 +24,10 @@ Mcu.Name=STM32F407V(E-G)Tx
 Mcu.Package=LQFP100
 Mcu.Pin0=PA0-WKUP
 Mcu.Pin1=PB1
-Mcu.Pin10=PD12
+Mcu.Pin10=PD13
-Mcu.Pin11=PD13
+Mcu.Pin11=PD14
-Mcu.Pin12=PD14
+Mcu.Pin12=PD15
-Mcu.Pin13=PD15
+Mcu.Pin13=VP_SYS_VS_Systick
-Mcu.Pin14=VP_SYS_VS_Systick
 Mcu.Pin2=PE7
 Mcu.Pin3=PE10
 Mcu.Pin4=PE11
@@ -36,8 +35,8 @@ Mcu.Pin5=PE12
 Mcu.Pin6=PE13
 Mcu.Pin7=PE14
 Mcu.Pin8=PE15
-Mcu.Pin9=PD11
+Mcu.Pin9=PD12
-Mcu.PinsNb=15
+Mcu.PinsNb=14
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F407VGTx
@@ -59,8 +58,6 @@ PA0-WKUP.Locked=true
 PA0-WKUP.Signal=GPXTI0
 PB1.Locked=true
 PB1.Signal=ADCx_IN9
-PD11.Locked=true
-PD11.Signal=GPIO_Output
 PD12.Locked=true
 PD12.Signal=GPIO_Output
 PD13.Locked=true
@@ -114,7 +111,7 @@ ProjectManager.ToolChainLocation=
 ProjectManager.UAScriptAfterPath=
 ProjectManager.UAScriptBeforePath=
 ProjectManager.UnderRoot=true
-ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_ADC1_Init-ADC1-false-HAL-true
+ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true
 RCC.AHBFreq_Value=16000000
 RCC.APB1Freq_Value=16000000
 RCC.APB1TimFreq_Value=16000000