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 DAC MSP Initialization * This function configures the hardware resources used in this example: * - Peripheral's clock enable * - Peripheral's GPIO Configuration * @param hdac: DAC handle pointer * @retval None */ void HAL_DAC_MspInit(DAC_HandleTypeDef *hdac) { GPIO_InitTypeDef GPIO_InitStruct; GPIO_TypeDef *port; UNUSED(hdac); /*##-1- Enable peripherals and GPIO Clocks #################################*/ /* Enable GPIO clock ****************************************/ port = set_GPIO_Port_Clock(STM_PORT(g_current_pin)); /* DAC Periph clock enable */ #ifdef __HAL_RCC_DAC1_CLK_ENABLE __HAL_RCC_DAC1_CLK_ENABLE(); #endif #ifdef __HAL_RCC_DAC_CLK_ENABLE __HAL_RCC_DAC_CLK_ENABLE(); #endif /*##-2- Configure peripheral GPIO ##########################################*/ /* DAC Channel1 GPIO pin configuration */ GPIO_InitStruct.Pin = STM_GPIO_PIN(g_current_pin); GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(port, &GPIO_InitStruct); }
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); }