用keil生成瑞萨EK-RA2A1单片机的adc初始化程序
时间: 2024-04-29 20:26:10 浏览: 13
好的,以下是KEIL生成瑞萨EK-RA2A1单片机的ADC初始化程序的步骤:
1. 打开KEIL软件,依次选择Project -> New MicroVision Project,输入项目名称;
2. 在弹出的对话框中选择设备型号为“R5F10PBG”(瑞萨EK-RA2A1单片机),确认选择;
3. 在Project菜单中选择Options for Target,选择Device,确保芯片型号正确;
4. 在Project菜单中选择Manage,选择Device Database,找到R5F10PBG芯片,双击打开,选择ADC模块,重新定义ADC资源;
5. 在Project菜单中选择C/C++ Source Group,右键选择Add New Item,选择C File,添加一个名为“adc.c”的文件;
6. 在adc.c中加入初始化代码,例如:
```
#include "ra2a1.h"
void adc_init(void)
{
volatile uint32_t i;
// Enable ADC clock
SYSTEM.PRCR.WORD = 0xA50B;
MSTP(ADC) = 0; // ADC module stop state release
// Set ADCS (sampling time) and CHSEL (input channel)
ADC.ADCSR.BIT.ADCS = 0b1111; // Sampling time = 239.5 cycles
ADC.ADCSR.BIT.CHSEL = 0; // Select AN000
// Start self-diagnosis
ADC.ADCSR.BIT.ADST = 1;
while (ADC.ADCSR.BIT.ADST)
{
// Wait until self-diagnosis is completed
}
// Initialize the AD converter
ADC.ADCSR.WORD = 0x2C40;
for (i = 0; i < 16; i++)
{
ADC.ADCSR.WORD |= 0x8000; // Wait 8us settling time
}
ADC.ADCSR.WORD |= 0x2000; // Start A/D conversion
// Wait for A/D conversion to end
while (!(ADC.ADCSR.WORD & 0x0008))
{
// Wait until A/D conversion is completed
}
// Clear the A/D conversion complete flag
ADC.ADCSR.WORD &= ~0x0008;
}
```
7. 在main函数中调用adc_init()函数即可。
希望这个答案对你有所帮助。