Posted on September 19, 2014 at 22:27
I would like create a variable that contains port and pin information, so I can use the high level name to perform all reads and writes.
I am looking for help with the syntax to create a:
- Structure for the port and pin assignments.
- How to assign the values to the variables
Note: Line number 1-32 are mycode attempt do, of course it doesn't work. The rest of the code are from the STM32 libraries
typedef struct
{
__IO uint32_t Port;
uint32_t Pin;
}SwitchInputs;
typedef struct
{
__IO uint32_t Port;
uint32_t Pin;
}LED_Outputs;
SwitchInputs Switch1;
LED_Outputs LED1;
Switch1.Port = GPIOA;
Switch1. Pin = GPIO_PIN_8;
LED1.Port = GPIOB;
LED1. Pin = GPIO_PIN_0;
GPIO_PinState HAL_GPIO_ReadPin(Switch1.Port, Switch1. Pin);
HAL_GPIO_WritePin(LED1.Port, LED. Pin);
/********************************************************************************/
void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
{
/* Check the parameters */
assert_param(IS_GPIO_PIN(GPIO_Pin));
assert_param(IS_GPIO_PIN_ACTION(PinState));
if (PinState != GPIO_PIN_RESET)
{
GPIOx->BSRRL = GPIO_Pin;
}
else
{
GPIOx->BSRRH = GPIO_Pin ;
}
}
/********************************************************************************/
GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
GPIO_PinState bitstatus;
/* Check the parameters */
assert_param(IS_GPIO_PIN(GPIO_Pin));
if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
{
bitstatus = GPIO_PIN_SET;
}
else
{
bitstatus = GPIO_PIN_RESET;
}
return bitstatus;
}
/********************************************************************************/
#define GPIOA ((GPIO_TypeDef *) GPIOA_BASE)
#define GPIOB ((GPIO_TypeDef *) GPIOB_BASE)
#define GPIOC ((GPIO_TypeDef *) GPIOC_BASE)
#define GPIOD ((GPIO_TypeDef *) GPIOD_BASE)
#define GPIOE ((GPIO_TypeDef *) GPIOE_BASE)
#define GPIOF ((GPIO_TypeDef *) GPIOF_BASE)
/********************************************************************************/
typedef struct
{
__IO uint32_t MODER; /*!< GPIO port mode register, Address offset: 0x00 */
__IO uint32_t OTYPER; /*!< GPIO port output type register, Address offset: 0x04 */
__IO uint32_t OSPEEDR; /*!< GPIO port output speed register, Address offset: 0x08 */
__IO uint32_t PUPDR; /*!< GPIO port pull-up/pull-down register, Address offset: 0x0C */
__IO uint32_t IDR; /*!< GPIO port input data register, Address offset: 0x10 */
__IO uint32_t ODR; /*!< GPIO port output data register, Address offset: 0x14 */
__IO uint16_t BSRRL; /*!< GPIO port bit set/reset low register, Address offset: 0x18 */
__IO uint16_t BSRRH; /*!< GPIO port bit set/reset high register, Address offset: 0x1A */
__IO uint32_t LCKR; /*!< GPIO port configuration lock register, Address offset: 0x1C */
__IO uint32_t AFR[2]; /*!< GPIO alternate function registers, Address offset: 0x20-0x24 */
__IO uint32_t BRR; /*!< GPIO bit reset register, Address offset: 0x28 */
}GPIO_TypeDef;
