从GITLAB上看到一个PCAN项目，本来是想移植过来用的，研究代码时候发现宝藏。
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#define EX_PIN_INIT( _PORT, _PIN, _MODE, _PULL, _SPEED, _AF )\ HAL_GPIO_Init( GPIO##_PORT, (GPIO_InitTypeDef[])\ {{\ .Pin = GPIO_PIN_##_PIN,\ .Mode = GPIO_##_MODE,\ .Pull = GPIO_##_PULL,\ .Speed = GPIO_##_SPEED,\ .Alternate = GPIO_##_AF\ }} ) #define PIN_INIT( CONFIG ) EX_PIN_INIT( CONFIG ) #define EX_PIN_DEINIT( _PORT, _PIN, ... ) HAL_GPIO_DeInit( GPIO##_PORT, GPIO_PIN_##_PIN ) #define PIN_DEINIT( CONFIG ) EX_PIN_DEINIT( CONFIG ) /* pin control */ #define EX_GPIO_PIN_STAT( PORT, PIN, ... ) ( (GPIO##PORT->IDR & (1u<<PIN)) != 0 ) #define EX_GPIO_PIN_STAT_INV( PORT, PIN, ... ) ( (GPIO##PORT->IDR & (1u<<PIN)) == 0 ) #define PIN_STAT( CONFIG ) EX_GPIO_PIN_STAT( CONFIG ) #define PIN_INV_STAT( CONFIG ) EX_GPIO_PIN_STAT_INV( CONFIG ) /* -------------------------- */ #define EX_GPIO_PIN_HI( PORT, PIN, ... ) GPIO##PORT->BSRR = (1u<<PIN) #define EX_GPIO_PIN_LOW( PORT, PIN, ... ) GPIO##PORT->BSRR = (0x10000u<<PIN) #define PIN_HI( CONFIG ) EX_GPIO_PIN_HI( CONFIG ) #define PIN_LOW( CONFIG ) EX_GPIO_PIN_LOW( CONFIG ) #define PIN_HiZ( CONFIG ) EX_GPIO_PIN_HI( CONFIG ) #define PIN_1( CONFIG ) EX_GPIO_PIN_HI( CONFIG ) #define PIN_0( CONFIG ) EX_GPIO_PIN_LOW( CONFIG ) #define PIN_ONE( CONFIG ) EX_GPIO_PIN_HI( CONFIG ) #define PIN_ZERO( CONFIG ) EX_GPIO_PIN_LOW( CONFIG ) /* -------------------------- */ #define EX_GPIO_PIN_TOGGLE( PORT, PIN, ... )\ do{\ if( GPIO##PORT->ODR & (1u<<PIN) ){\ EX_GPIO_PIN_LOW( PORT, PIN );\ }\ else{\ EX_GPIO_PIN_HI( PORT, PIN );\ }\ }while(0) #define PIN_TOGGLE( CONFIG ) EX_GPIO_PIN_TOGGLE( CONFIG ) #define EX_PIN_PORT( PORT, ... ) PORT #define PIN_PORT( CONFIG ) EX_PIN_PORT( CONFIG ) /* maximimum is 8 params */ #define NUM_ARGS_(_1, _2, _3, _4, _5, _6, _7, _8, TOTAL, ...) TOTAL #define NUM_ARGS(...) NUM_ARGS_(__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1) #define CONCATE_(X, Y) X##Y #define CONCATE(MACRO, NUMBER) CONCATE_(MACRO, NUMBER) #define VA_MACRO(MACRO, ...) CONCATE(MACRO, NUM_ARGS(__VA_ARGS__))(__VA_ARGS__) #define PORT_ENABLE_CLOCK(...)\ do{\ __IO uint32_t tmp;\ VA_MACRO(PORT_ENABLE_CLOCK, __VA_ARGS__);\ /* readback */\ tmp = RCC->AHB1ENR;\ (void)tmp;\ }while(0) #define PORT_ENABLE_CLOCK1(_1) RCC->AHB1ENR |= RCC_AHB1ENR_GPIO##_1##EN #define PORT_ENABLE_CLOCK2(_1, _2) RCC->AHB1ENR |= RCC_AHB1ENR_GPIO##_1##EN |\ RCC_AHB1ENR_GPIO##_2##EN #define PORT_ENABLE_CLOCK3(_1, _2, _3) RCC->AHB1ENR |= RCC_AHB1ENR_GPIO##_1##EN |\ RCC_AHB1ENR_GPIO##_2##EN |\ RCC_AHB1ENR_GPIO##_3##EN #define PORT_ENABLE_CLOCK4(_1, _2, _3, _4) RCC->AHB1ENR |= RCC_AHB1ENR_GPIO##_1##EN |\ RCC_AHB1ENR_GPIO##_2##EN |\ RCC_AHB1ENR_GPIO##_3##EN |\ RCC_AHB1ENR_GPIO##_4##EN |
其中PORT_ENABLE_CLOCK这个宏用的太妙了，看看是怎么用的：
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#define IO_BEEP B, 15, OUT_PP, NOPULL, SPEED_FREQ_MEDIUM, NOAF #define IO_PWRBTN A, 7, OUT_PP, NOPULL, SPEED_FREQ_MEDIUM, NOAF void main() { systick_config(); PORT_ENABLE_CLOCK(PIN_PORT(IO_BEEP),PIN_PORT(IO_PWRBTN)); PIN_INIT(IO_BEEP); PIN_INIT(IO_PWRBTN); PIN_LOW(IO_BEEP); PIN_LOW(IO_PWRBTN); while(1){ PIN_HI(IO_BEEP); PIN_HI(IO_PWRBTN); delay_1ms(100); PIN_LOW(IO_BEEP); PIN_LOW(IO_PWRBTN); delay_1ms(900); } } |
