/**
* @brief DAC configuration
* @note For this example, generate a signal on a spare DAC
* channel, so user has just to connect a wire between DAC channel
* (pin PA.00) and ADC channel (pin PA.00) to run this example.
* (this prevents the user from resorting to an external signal generator)
* @param None
* @retval None
*/
static void DAC_Config(void)
{
static DAC_ChannelConfTypeDef sConfig;
/* Configuration of DACx peripheral */
DacHandle.Instance = DACx;
if (HAL_DAC_DeInit(&DacHandle) != HAL_OK)
{
/* DAC deinitialization error */
Error_Handler();
}
if (HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* DAC initialization error */
Error_Handler();
}
/* Configuration of DAC channel */
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
sConfig.DAC_UserTrimming = DAC_TRIMMING_FACTORY;
sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_DISABLE;
sConfig.DAC_SampleAndHold = DAC_SAMPLEANDHOLD_DISABLE;
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL_TO_ADCx_CHANNELa) != HAL_OK)
{
/* Channel configuration error */
Error_Handler();
}
}
static void DAC_Ch1_EscalatorConfig(void)
{
/*##-1- Initialize the DAC peripheral ######################################*/
if(HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-1- DAC channel1 Configuration #########################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if(HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL1) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/*##-2- Enable DAC Channel1 and associated DMA #############################*/
if(HAL_DAC_Start_DMA(&DacHandle, DACx_CHANNEL1, (uint32_t*)aEscalator8bit, 6, DAC_ALIGN_8B_R) != HAL_OK)
{
/* Start DMA Error */
Error_Handler();
}
}
/**
* @brief DAC Channel 1 configuration
* @param None
* @retval None
*/
static void DAC_Ch1_Config(void)
{
static DAC_ChannelConfTypeDef sConfig;
/*##-1- Initialize the DAC peripheral ######################################*/
if(HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Error */
ErrorHandler();
}
/*##-1- DAC channel1 Configuration #########################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if(HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL1) != HAL_OK)
{
/* Channel configuration Error */
ErrorHandler();
}
/*##-2- Enable DAC Channel1 and associeted DMA #############################*/
if(HAL_DAC_Start_DMA(&DacHandle, DACx_CHANNEL1, (uint32_t*)aSine12bit_Buffer, BUFFER_SIZE, DAC_ALIGN_12B_R) != HAL_OK)
{
/* Start DMA Error */
ErrorHandler();
}
}
/**
* @brief DAC configuration
* @param None
* @retval None
*/
static void DAC_Config(void)
{
static DAC_ChannelConfTypeDef sConfig;
/* Configuration of DACx peripheral */
DacHandle.Instance = DACx;
if (HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* DAC Initiliazation Error */
Error_Handler();
}
/* Configuration of DACx channel 1 */
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL_TO_ADCx_CHANNEL_DIFF_HIGH) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/* Configuration of DACx channel 2 */
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL_TO_ADCx_CHANNEL_DIFF_LOW) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
}
/**
* @brief Configures the DAC channel 1 with output buffer enabled.
* @param None
* @retval None
*/
static void DAC_Config(void)
{
/*##-1- Configure the DAC peripheral #######################################*/
DacHandle.Instance = DACx;
if(HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Error */
ErrorHandler();
}
/*##-2- Configure DAC channel1 #############################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if(HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL) != HAL_OK)
{
/* Channel configuration Error */
ErrorHandler();
}
/*##-3- Set DAC Channel1 DHR register ######################################*/
if(HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL, DAC_ALIGN_12B_R, 868) != HAL_OK)
{
/* Setting value Error */
ErrorHandler();
}
/*##-4- Enable DAC Channel1 ################################################*/
if(HAL_DAC_Start(&DacHandle, DACx_CHANNEL) != HAL_OK)
{
/* Start Error */
ErrorHandler();
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/*##-1- Configure the DAC peripheral #######################################*/
DacHandle.Instance = DACx;
if (HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure DAC channel1 #############################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/*##-3- Set DAC Channel1 DHR register ######################################*/
if (HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL, DAC_ALIGN_8B_R, 0xFF) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
/*##-4- Enable DAC Channel1 ################################################*/
if (HAL_DAC_Start(&DacHandle, DACx_CHANNEL) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/*##-1- Configure the DAC peripheral #######################################*/
DacHandle.Instance = DACx;
if(HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure DAC channel1 #############################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if(HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/*##-3- Set DAC Channel1 DHR register ######################################*/
if(HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL, DAC_ALIGN_8B_R, 0xFF) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
/*##-4- Enable DAC Channel1 ################################################*/
if(HAL_DAC_Start(&DacHandle, DACx_CHANNEL) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/* Infinite loop */
while (1)
{
}
}
void analogout_init(dac_t *obj, PinName pin)
{
uint32_t channel ;
HAL_StatusTypeDef status;
// Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
// Get the functions (dac channel) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
// Save the channel for the write and read functions
obj->channel = STM_PIN_CHANNEL(function);
if (obj->dac == (DACName)NC) {
error("DAC pin mapping failed");
}
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
__GPIOA_CLK_ENABLE();
__DAC_CLK_ENABLE();
DacHandle.Instance = DAC;
status = HAL_DAC_Init(&DacHandle);
if (status != HAL_OK) {
error("HAL_DAC_Init failed");
}
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (obj->channel == 1) {
channel = DAC_CHANNEL_1;
} else {
channel = DAC_CHANNEL_2;
}
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, channel) != HAL_OK) {
error("HAL_DAC_ConfigChannel failed");
}
if (HAL_DAC_Start(&DacHandle, channel) != HAL_OK) {
error("HAL_DAC_Start failed");
}
if (HAL_DAC_SetValue(&DacHandle, channel, DAC_ALIGN_12B_R, 0x000) != HAL_OK) {
error("HAL_DAC_SetValue failed");
}
}
void analogout_init(dac_t *obj, PinName pin) {
DAC_ChannelConfTypeDef sConfig = {0};
// Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
// Get the functions (dac channel) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
// Save the channel for the write and read functions
switch (STM_PIN_CHANNEL(function)) {
case 1:
obj->channel = DAC_CHANNEL_1;
break;
#if defined(DAC_CHANNEL_2)
case 2:
obj->channel = DAC_CHANNEL_2;
break;
#endif
default:
error("Unknown DAC channel");
break;
}
if (obj->dac == (DACName)NC) {
error("DAC pin mapping failed");
}
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_DAC_CLK_ENABLE();
obj->handle.Instance = DAC;
obj->handle.State = HAL_DAC_STATE_RESET;
if (HAL_DAC_Init(&obj->handle) != HAL_OK ) {
error("HAL_DAC_Init failed");
}
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) {
error("HAL_DAC_ConfigChannel failed");
}
analogout_write_u16(obj, 0);
}
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig = {0};
// Get the peripheral name from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT(obj->dac != (DACName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
// Save the pin for future use
obj->pin = pin;
// Enable DAC clock
__HAL_RCC_DAC1_CLK_ENABLE();
// Configure DAC
DacHandle.Instance = DAC;
if (HAL_DAC_Init(&DacHandle) != HAL_OK) {
error("Cannot initialize DAC\n");
}
sConfig.DAC_SampleAndHold = DAC_SAMPLEANDHOLD_DISABLE;
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_DISABLE;
sConfig.DAC_UserTrimming = DAC_TRIMMING_FACTORY;
if (obj->channel == 2) {
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2) != HAL_OK) {
error("Cannot configure DAC channel 2\n");
}
channel2_used = 1;
} else { // channel 1 per default
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1) != HAL_OK) {
error("Cannot configure DAC channel 1\n");
}
obj->channel = 1;
channel1_used = 1;
}
analogout_write_u16(obj, 0);
}
/**
* @brief This function will set the DAC to the required value
* @param port : the gpio port to use
* @param pin : the gpio pin to use
* @param value : the value to push on the adc output
* @param do_init : if set to 1 the initialization of the adc is done
* @retval None
*/
void dac_write_value(PinName pin, uint32_t value, uint8_t do_init)
{
DAC_HandleTypeDef DacHandle = {};
DAC_ChannelConfTypeDef dacChannelConf = {};
uint32_t dacChannel;
DacHandle.Instance = pinmap_peripheral(pin, PinMap_DAC);
if (DacHandle.Instance == NP) return;
dacChannel = get_dac_channel(pin);
if (!IS_DAC_CHANNEL(dacChannel)) return;
if(do_init == 1) {
if (HAL_DAC_DeInit(&DacHandle) != HAL_OK)
{
/* DeInitialization Error */
return;
}
/*##-1- Configure the DAC peripheral #######################################*/
g_current_pin = pin;
if (HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Initialization Error */
return;
}
dacChannelConf.DAC_Trigger = DAC_TRIGGER_NONE;
dacChannelConf.DAC_OutputBuffer=DAC_OUTPUTBUFFER_ENABLE;
/*##-2- Configure DAC channel1 #############################################*/
if (HAL_DAC_ConfigChannel(&DacHandle, &dacChannelConf, dacChannel) != HAL_OK)
{
/* Channel configuration Error */
return;
}
}
/*##-3- Set DAC Channel1 DHR register ######################################*/
if (HAL_DAC_SetValue(&DacHandle, dacChannel, DAC_ALIGN_12B_R, value) != HAL_OK)
{
/* Setting value Error */
return;
}
/*##-4- Enable DAC Channel1 ################################################*/
HAL_DAC_Start(&DacHandle, dacChannel);
}
/* DAC init function */
void MX_DAC_Init(void)
{
DAC_ChannelConfTypeDef sConfig;
/**DAC Initialization
*/
hdac.Instance = DAC;
HAL_DAC_Init(&hdac);
/**DAC channel OUT1 config
*/
sConfig.DAC_Trigger = DAC_TRIGGER_T2_TRGO;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1);
}
int MX_DAC_Init(void)
{
hdac.Instance = DAC;
if( HAL_DAC_Init( &hdac ) != HAL_OK ) {
return 0;
}
DAC_ChannelConfTypeDef sConfig;
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if( HAL_DAC_ConfigChannel( &hdac, &sConfig, DAC_CHANNEL_1 ) != HAL_OK ) {
return 0;
}
if( HAL_DAC_ConfigChannel( &hdac, &sConfig, DAC_CHANNEL_2 ) != HAL_OK ) {
return 0;
}
return 1;
}
/**
* @brief For this example, generate a waveform voltage on a spare DAC
* channel, so user has just to connect a wire between DAC channel
* (pin PA.04) and ADC channel (pin PA.04) to run this example.
* (this prevents the user from resorting to an external signal generator)
* This function configures the DAC and generates a constant voltage of Vdda/2.
* To modify the voltage level, use function "WaveformVoltageGenerationForTest_Update"
* @param None
* @retval None
*/
static void WaveformVoltageGenerationForTest_Config(void)
{
static DAC_ChannelConfTypeDef sConfig;
/*## Configure peripherals #################################################*/
/* Configuration of DACx peripheral */
DacHandle.Instance = DACx;
if (HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* DAC initialization error */
Error_Handler();
}
/* Configuration of DAC channel */
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL_TO_ADCx_CHANNELa) != HAL_OK)
{
/* Channel configuration error */
Error_Handler();
}
/*## Enable peripherals ####################################################*/
/* Set DAC Channel data register: channel corresponding to ADC channel CHANNELa */
/* Set DAC output to 1/2 of full range (4095 <=> Vdda=3.3V): 2048 <=> 1.65V */
if (HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL_TO_ADCx_CHANNELa, DAC_ALIGN_12B_R, RANGE_12BITS/2) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
/* Enable DAC Channel: channel corresponding to ADC channel CHANNELa */
if (HAL_DAC_Start(&DacHandle, DACx_CHANNEL_TO_ADCx_CHANNELa) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
}
/**
* @brief DAC Channel1 Triangle Configuration
* @param None
* @retval None
*/
static void DAC_Ch1_TriangleConfig(void)
{
/*##-1- Initialize the DAC peripheral ######################################*/
if(HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- DAC channel2 Configuration #########################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if(HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL1) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/*##-3- DAC channel2 Triangle Wave generation configuration ################*/
if(HAL_DACEx_TriangleWaveGenerate(&DacHandle, DACx_CHANNEL1, DAC_TRIANGLEAMPLITUDE_1023) != HAL_OK)
{
/* Triangle wave generation Error */
Error_Handler();
}
/*##-4- Enable DAC Channel1 ################################################*/
if(HAL_DAC_Start(&DacHandle, DACx_CHANNEL1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/*##-5- Set DAC channel1 DHR12RD register ##################################*/
if(HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL1, DAC_ALIGN_12B_R, 0x100) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
}
/**
* @brief Configure DACx
* @param None
* @retval None
*/
static void DACx_Config(void)
{
/*##-1- Configure the DAC peripheral #######################################*/
DacHandle.Instance = DACx;
if(HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Initiliazation Error */
Error_Handler();
}
/*##-2- Configure DAC channel1 #############################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if(HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/*##-3- Set DAC Channel1 DHR register ######################################*/
/* VREF ~ 3.3 V */
/* DAC_OUT = (3.3 * 2588) / 4095 ~ 2.086 V = 3.3*(1-exp(-t/R*C)) with t=R*C */
/* Set DAC Value = 2588 */
if(HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL, DAC_ALIGN_12B_R, 2588) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
/*##-4- Enable DAC Channel1 ################################################*/
if(HAL_DAC_Start(&DacHandle, DACx_CHANNEL) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
}
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig = {0};
// Get the peripheral name from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT(obj->dac != (DACName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
// Save the channel for the write and read functions
switch (STM_PIN_CHANNEL(function)) {
case 1:
obj->channel = DAC_CHANNEL_1;
break;
#if defined(DAC_CHANNEL_2)
case 2:
obj->channel = DAC_CHANNEL_2;
break;
#endif
default:
error("Unknown DAC channel");
break;
}
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
// Save the pin for future use
obj->pin = pin;
// Enable DAC clock
if (obj->dac == DAC_1) {
__HAL_RCC_DAC1_CLK_ENABLE();
}
#if defined(DAC2)
if (obj->dac == DAC_2) {
__HAL_RCC_DAC2_CLK_ENABLE();
}
#endif
// Configure DAC
obj->handle.Instance = (DAC_TypeDef *)(obj->dac);
obj->handle.State = HAL_DAC_STATE_RESET;
if (HAL_DAC_Init(&obj->handle) != HAL_OK) {
error("HAL_DAC_Init failed");
}
/* Enable both Buffer and Switch in the configuration,
* letting HAL layer in charge of selecting either one
* or the other depending on the actual DAC instance and
* channel being configured.
*/
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
#if defined(DAC_OUTPUTSWITCH_ENABLE)
sConfig.DAC_OutputSwitch = DAC_OUTPUTSWITCH_ENABLE;
#endif
if (pin == PA_4) {
pa4_used = 1;
}
if (pin == PA_5) {
pa5_used = 1;
}
if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) {
error("HAL_DAC_ConfigChannel failed");
}
analogout_write_u16(obj, 0);
}
mp_obj_t pyb_dac_write_timed(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
pyb_dac_obj_t *self = args[0];
// parse args
mp_arg_val_t vals[PYB_DAC_WRITE_TIMED_NUM_ARGS];
mp_arg_parse_all(n_args - 1, args + 1, kw_args, PYB_DAC_WRITE_TIMED_NUM_ARGS, pyb_dac_write_timed_args, vals);
// get the data to write
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(vals[0].u_obj, &bufinfo, MP_BUFFER_READ);
// set TIM6 to trigger the DAC at the given frequency
TIM6_Config(vals[1].u_int);
__DMA1_CLK_ENABLE();
/*
DMA_Cmd(self->dma_stream, DISABLE);
while (DMA_GetCmdStatus(self->dma_stream) != DISABLE) {
}
DAC_Cmd(self->dac_channel, DISABLE);
*/
/*
// DAC channel configuration
DAC_InitTypeDef DAC_InitStructure;
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T7_TRGO;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1; // unused, but need to set it to a valid value
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(self->dac_channel, &DAC_InitStructure);
*/
// DMA1_Stream[67] channel7 configuration
DMA_HandleTypeDef DMA_Handle;
DMA_Handle.Instance = self->dma_stream;
// Need to deinit DMA first
DMA_Handle.State = HAL_DMA_STATE_READY;
HAL_DMA_DeInit(&DMA_Handle);
DMA_Handle.Init.Channel = DMA_CHANNEL_7;
DMA_Handle.Init.Direction = DMA_MEMORY_TO_PERIPH;
DMA_Handle.Init.PeriphInc = DMA_PINC_DISABLE;
DMA_Handle.Init.MemInc = DMA_MINC_ENABLE;
DMA_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
DMA_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
DMA_Handle.Init.Mode = vals[2].u_int;
DMA_Handle.Init.Priority = DMA_PRIORITY_HIGH;
DMA_Handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
DMA_Handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
DMA_Handle.Init.MemBurst = DMA_MBURST_SINGLE;
DMA_Handle.Init.PeriphBurst = DMA_PBURST_SINGLE;
HAL_DMA_Init(&DMA_Handle);
if (self->dac_channel == DAC_CHANNEL_1) {
__HAL_LINKDMA(&DAC_Handle, DMA_Handle1, DMA_Handle);
} else {
__HAL_LINKDMA(&DAC_Handle, DMA_Handle2, DMA_Handle);
}
DAC_Handle.Instance = DAC;
DAC_Handle.State = HAL_DAC_STATE_RESET;
HAL_DAC_Init(&DAC_Handle);
if (self->state != 3) {
DAC_ChannelConfTypeDef config;
config.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
config.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
HAL_DAC_ConfigChannel(&DAC_Handle, &config, self->dac_channel);
self->state = 3;
}
HAL_DAC_Start_DMA(&DAC_Handle, self->dac_channel, (uint32_t*)bufinfo.buf, bufinfo.len, DAC_ALIGN_8B_R);
/*
// enable DMA stream
DMA_Cmd(self->dma_stream, ENABLE);
while (DMA_GetCmdStatus(self->dma_stream) == DISABLE) {
}
// enable DAC channel
DAC_Cmd(self->dac_channel, ENABLE);
// enable DMA for DAC channel
DAC_DMACmd(self->dac_channel, ENABLE);
*/
//printf("DMA: %p %lu\n", bufinfo.buf, bufinfo.len);
return mp_const_none;
}
void dac_init(void) {
memset(&DAC_Handle, 0, sizeof DAC_Handle);
DAC_Handle.Instance = DAC;
DAC_Handle.State = HAL_DAC_STATE_RESET;
HAL_DAC_Init(&DAC_Handle);
}
