{"id":13976,"date":"2018-01-12T10:54:58","date_gmt":"2018-01-12T15:54:58","guid":{"rendered":"http:\/\/embedded-lab.com\/blog\/?p=13976"},"modified":"2018-07-02T09:57:15","modified_gmt":"2018-07-02T13:57:15","slug":"continuing-stm8-microcontroller-expedition","status":"publish","type":"post","link":"https:\/\/embedded-lab.com\/blog\/continuing-stm8-microcontroller-expedition\/","title":{"rendered":"Continuing the STM8 Expedition"},"content":{"rendered":"

This post is the continuation of the\u00a0first post on STM8 microcontrollers\u00a0here<\/a>.<\/p>\n

\"STM8S105<\/a><\/p>\n

<\/p>\n

ADC Interrupt<\/h2>\n

Instead of polling for ADC\u2019s end of conversion (EOC) state, it is wise to use ADC interrupt. Just as with any hardware peripheral, interrupt methods make a system highly responsive. Interrupts like these free up the CPU for other tasks. However, it is up to the coder to determine interrupt priorities and look out for situation that may cause too many interrupts to be processed in a short while.<\/p>\n

Hardware Connection<\/h4>\n

\"adc_isr\"
\n<\/a><\/p>\n

Code Example<\/span><\/h4>\n

 <\/p>\n

stm8s_it.h (top part only)<\/u><\/em><\/strong><\/p>\n

#ifndef<\/strong> __STM8S_IT_H<\/span><\/em><\/pre>\n
#define<\/strong> __STM8S_IT_H<\/strong><\/span><\/em><\/pre>\n
<\/pre>\n
@far @interrupt void<\/strong> ADC_IRQHandler<\/strong>(void<\/strong>);<\/span><\/em><\/pre>\n
<\/pre>\n
\/* Includes ------------------------------------------------------------------*\/<\/span><\/em><\/pre>\n
#include<\/strong> \"stm8s.h\"<\/span><\/em><\/pre>\n
....<\/span><\/em><\/pre>\n
 <\/p>\n
stm8s_it.c (top part only)<\/u><\/em><\/strong><\/p>\n
#include<\/strong> \"stm8s.h\"<\/span><\/em><\/pre>\n
#include<\/strong> \"stm8s_it.h\"<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
extern<\/strong> unsigned<\/strong> int<\/strong> adc_value;<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
void<\/strong> ADC_IRQHandler<\/strong>(void<\/strong>)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 adc_value = ADC1_GetConversionValue<\/strong>();<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_ClearFlag<\/strong>(ADC1_FLAG_EOC);<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
....<\/span><\/em><\/pre>\n
 <\/p>\n
stm8_interrupt_vector.c (shortened)<\/u><\/em><\/strong><\/p>\n
#include<\/strong> \"stm8s_it.h\"<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
typedef<\/strong> void<\/strong> @far<\/strong> (*interrupt_handler_t)(void<\/strong>);<\/span><\/em><\/pre>\n
<\/pre>\n
struct<\/strong> interrupt_vector<\/strong> {<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 unsigned<\/strong> char<\/strong> interrupt_instruction;<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 interrupt_handler_t interrupt_handler;<\/span><\/em><\/pre>\n
};<\/span><\/em><\/pre>\n
<\/pre>\n
\/\/@far @interrupt void NonHandledInterrupt (void)<\/span><\/em><\/pre>\n
\/\/{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* in order to detect unexpected events during development,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 it is recommended to set a breakpoint on the following instruction<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 *\/<\/span><\/em><\/pre>\n
\/\/\u00a0\u00a0\u00a0\u00a0 return;<\/span><\/em><\/pre>\n
\/\/}<\/span><\/em><\/pre>\n
<\/pre>\n
extern<\/strong> void<\/strong> _stext<\/strong>();\u00a0\u00a0\u00a0\u00a0 \/* startup routine *\/<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
struct<\/strong> interrupt_vector<\/strong> const<\/strong> _vectab[] = {<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {0x82, (interrupt_handler_t)_stext<\/strong>}, \/* reset *\/<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {0x82, NonHandledInterrupt}, \/* trap\u00a0 *\/<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {0x82, NonHandledInterrupt}, \/* irq0\u00a0 *\/<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ....<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {0x82, (interrupt_handler_t)ADC_IRQHandler}, \/* irq22 *\/<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ....<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {0x82, NonHandledInterrupt}, \/* irq29 *\/<\/span><\/em><\/pre>\n
};<\/span><\/em><\/pre>\n
 <\/p>\n
main.c
\n<\/u><\/strong><\/em><\/p>\n
#include<\/strong> \"STM8S.h\"<\/span><\/em><\/pre>\n
#include<\/strong> \"lcd.h\"<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
unsigned<\/strong> int<\/strong> adc_value;<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
unsigned<\/strong> char<\/strong> bl_state;<\/span><\/em><\/pre>\n
unsigned<\/strong> char<\/strong> data_value;<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
void<\/strong> clock_setup<\/strong>(void<\/strong>);<\/span><\/em><\/pre>\n
void<\/strong> GPIO_setup<\/strong>(void<\/strong>);<\/span><\/em><\/pre>\n
void<\/strong> ADC1_setup<\/strong>(void<\/strong>);<\/span><\/em><\/pre>\n
void<\/strong> lcd_print<\/strong>(unsigned<\/strong> char<\/strong> x_pos, unsigned<\/strong> char<\/strong> y_pos, unsigned<\/strong> int<\/strong> value);<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
void<\/strong> main<\/strong>(void<\/strong>)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 float<\/strong> mv = 0x00000000;<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 clock_setup<\/strong>();<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GPIO_setup<\/strong>();<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_setup<\/strong>();<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_init<\/strong>();\u00a0<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_clear_home<\/strong>();<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_goto<\/strong>(2, 0);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_putstr<\/strong>(\"STM8 ADC ISR\");<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_goto<\/strong>(0, 1);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_putstr<\/strong>(\"A0\/mV\");<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 while<\/strong>(TRUE)<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_StartConversion<\/strong>();<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 mv = (adc_value * 5000.0);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 mv \/= 1023.0;<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lcd_print<\/strong>(7, 1, mv);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lcd_print<\/strong>(12, 1, adc_value);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GPIO_WriteReverse<\/strong>(GPIOD, GPIO_PIN_0);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 delay_ms<\/strong>(160);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 };<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
void<\/strong> clock_setup<\/strong>(void<\/strong>)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_DeInit<\/strong>();<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_HSECmd<\/strong>(DISABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_LSICmd<\/strong>(DISABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_HSICmd<\/strong>(ENABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 while<\/strong>(CLK_GetFlagStatus<\/strong>(CLK_FLAG_HSIRDY) == FALSE);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_ClockSwitchCmd<\/strong>(ENABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_HSIPrescalerConfig<\/strong>(CLK_PRESCALER_HSIDIV4);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_SYSCLKConfig<\/strong>(CLK_PRESCALER_CPUDIV1);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_ClockSwitchConfig<\/strong>(CLK_SWITCHMODE_AUTO, CLK_SOURCE_HSI,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DISABLE, CLK_CURRENTCLOCKSTATE_ENABLE);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_I2C, ENABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_ADC, ENABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_SPI, DISABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_AWU, DISABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_UART1, DISABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_TIMER1, DISABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_TIMER2, DISABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CLK_PeripheralClockConfig<\/strong>(CLK_PERIPHERAL_TIMER4, DISABLE);<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
void<\/strong> GPIO_setup<\/strong>(void<\/strong>)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GPIO_DeInit<\/strong>(GPIOB);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GPIO_Init<\/strong>(GPIOB, ((GPIO_Pin_TypeDef)(GPIO_PIN_0 | GPIO_PIN_1)),\u00a0\u00a0\u00a0\u00a0\u00a0 GPIO_MODE_IN_FL_NO_IT);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GPIO_DeInit<\/strong>(GPIOD);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GPIO_Init<\/strong>(GPIOD, GPIO_PIN_0, GPIO_MODE_OUT_OD_HIZ_FAST);<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
void<\/strong> ADC1_setup<\/strong>(void<\/strong>)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_DeInit<\/strong>();\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_Init<\/strong>(ADC1_CONVERSIONMODE_CONTINUOUS,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_CHANNEL_0,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_PRESSEL_FCPU_D18,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_EXTTRIG_GPIO,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 DISABLE,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_ALIGN_RIGHT,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_SCHMITTTRIG_CHANNEL0,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 DISABLE);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_ITConfig<\/strong>(ADC1_IT_EOCIE, ENABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 enableInterrupts<\/strong>();<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_Cmd<\/strong>(ENABLE);<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
<\/pre>\n
<\/pre>\n
void<\/strong> lcd_print<\/strong>(unsigned<\/strong> char<\/strong> x_pos, unsigned<\/strong> char<\/strong> y_pos, unsigned<\/strong> int<\/strong> value)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 char<\/strong> chr = 0x00;<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 chr = ((value \/ 1000) + 0x30);\u00a0\u00a0<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_goto<\/strong>(x_pos, y_pos);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_putchar<\/strong>(chr);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 chr = (((value \/ 100) % 10) + 0x30);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_goto<\/strong>((x_pos + 1), y_pos);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_putchar<\/strong>(chr);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 chr = (((value \/ 10) % 10) + 0x30);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_goto<\/strong>((x_pos + 2), y_pos);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_putchar<\/strong>(chr);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 chr = ((value % 10) + 0x30);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_goto<\/strong>((x_pos + 3), y_pos);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LCD_putchar<\/strong>(chr);<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
 <\/p>\n
Explanation<\/h4>\n
This example and the first ADC example is all same except for the interrupt part. Note the last three lines below.<\/p>\n
void<\/strong> ADC1_setup<\/strong>(void<\/strong>)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_DeInit<\/strong>();\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_Init<\/strong>(ADC1_CONVERSIONMODE_CONTINUOUS,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_CHANNEL_0,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_PRESSEL_FCPU_D18,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_EXTTRIG_GPIO,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 DISABLE,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_ALIGN_RIGHT,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 ADC1_SCHMITTTRIG_CHANNEL0,<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 DISABLE);<\/span><\/em><\/pre>\n
<\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_ITConfig<\/strong>(ADC1_IT_EOCIE, ENABLE);<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 enableInterrupts<\/strong>();<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_Cmd<\/strong>(ENABLE);<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
As can be seen, End-of-Conversion (EOC)<\/em><\/strong> interrupt has been enabled along with global interrupt and the ADC itself.<\/p>\n
In the vector mapping file, ADC interrupt is set.<\/p>\n
{0x82, (interrupt_handler_t)ADC_IRQHandler}, \/* irq22 *\/<\/span><\/em><\/pre>\n
When ADC EOC interrupt triggers, the ADC data buffer is read and the EOC flag is cleared.<\/p>\n
void<\/strong> ADC_IRQHandler<\/strong>(void<\/strong>)<\/span><\/em><\/pre>\n
{<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 adc_value = ADC1_GetConversionValue<\/strong>();<\/span><\/em><\/pre>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ADC1_ClearFlag<\/strong>(ADC1_FLAG_EOC);<\/span><\/em><\/pre>\n
}<\/span><\/em><\/pre>\n
 <\/p>\n
Demo<\/span><\/h4>\n
\"ADC<\/a> \"ADC<\/a><\/p>\n