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boardinfo.c
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#include "boardinfo.h"
#define ADC1_DR_Address ((u32)0x4001244C)
volatile u16 ADC_ConvertedValue = 0;
static void rcc_config(void)
{
/* Enable DMA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
}
static void dma_config(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* DMA channel1 configuration */
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; // 外设基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue; // AD转换值所存放的内存基地址 （就是给个地址）
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; // 外设作为数据传输的来源
DMA_InitStructure.DMA_BufferSize = 1; // 定义指定DMA通道 DMA缓存的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; // 外设地址寄存器不变
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable; // 内存地址寄存器不变
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; // 数据宽度为16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; // HalfWord
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循环模式下
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //高优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //没有设置为内存到内存的传输
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* Enable DMA channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE); //ENABLE她
}
static void iadc_config(void)
{
ADC_InitTypeDef ADC_InitStructure;
/* ADC1 configuration */
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //独立工作模式
ADC_InitStructure.ADC_ScanConvMode = ENABLE; //多通道
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //连续转换
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //由软件触发启动
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //Right
ADC_InitStructure.ADC_NbrOfChannel = 1; //仅一个通道转换
ADC_Init(ADC1, &ADC_InitStructure);
/*配置ADC时钟，为PCLK2的8分频，即9Hz*/
RCC_ADCCLKConfig(RCC_PCLK2_Div8);
/* ADC1 regular channel16 configuration */
//设置采样通道IN16, 设置采样时间
ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 1, ADC_SampleTime_239Cycles5);
//使能温度传感器和内部参考电压
ADC_TempSensorVrefintCmd(ENABLE);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibaration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
static rt_err_t rt_gpio_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t rt_gpio_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t rt_gpio_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t rt_gpio_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
RT_ASSERT(dev != RT_NULL);
*(u16*)buffer = ADC_ConvertedValue;
return size;
}
rt_size_t rt_gpio_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
return size;
}
rt_err_t rt_gpio_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return RT_EOK;
}
static struct rt_device chip_temp_device;
void rt_hw_chip_register(void)
{
rcc_config();
dma_config();
iadc_config();
rt_kprintf("stm32f103ze temperature = %d ℃",ADC_ConvertedValue);
chip_temp_device.type = RT_Device_Class_Char;
chip_temp_device.rx_indicate = RT_NULL;
chip_temp_device.tx_complete = RT_NULL;
chip_temp_device.init = rt_gpio_init;
chip_temp_device.open = rt_gpio_open;
chip_temp_device.close = rt_gpio_close;
chip_temp_device.read = rt_gpio_read;
chip_temp_device.write = rt_gpio_write;
chip_temp_device.control = rt_gpio_control;
chip_temp_device.user_data = RT_NULL;
/* register a character device */
rt_device_register(&chip_temp_device,"IC_T", RT_DEVICE_OFLAG_RDONLY);
}
#ifdef RT_USING_FINSH
#include <finsh.h>
void ic_temp()
{
rt_kprintf("stm32f103ze temperature = %03d ℃",(0x6EE-ADC_ConvertedValue)/0x05+25);
}
FINSH_FUNCTION_EXPORT(ic_temp,ic_temp() -- stm32f103ve chip internal temperature);
//rt_kprintf("stm32f103ze temperature = %3d ℃",(0x6EE-ADC_ConvertedValue)/0x05+25);
#endif