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标题: AM5728 PRU问题 [打印本页]

作者: liuzhanchun 时间: 2018-11-1 17:47
标题: AM5728 PRU问题
您好，之前看PRU资料，GPIO的操作都是对R30寄存器进行操作的，阅读创龙现在的代码未发现对R30寄存器进行操作，是哪里进行了映射了吗？

这样如何到R30寄存器的。

#include <stdint.h>
#include <pru_cfg.h>
#include "resource_table_empty.h"
#include "dra7_pinctrl.h"

/* LED port address */
#define GPIO3_BASE_ADDR          0x48057000
#define GPIO_OE_OFFSET             0x134
#define GPIO_CLRDATAOUT_OFFSET       0x190
#define GPIO_SETDATAOUT_OFFSET    0x194

//volatile register uint32_t __R30;

volatile pruCfg CT_CFG __attribute__((cregister("PRU_CFG", near), peripheral));

int main(void) {

uint32_t i;
uint32_t value;

/* GPI Mode 0, GPO Mode 0 */
CT_CFG.GPCFG0 = 0;
/* Clear SYSCFG[STANDBY_INIT] to enable OCP master port */
CT_CFG.SYSCFG_bit.STANDBY_INIT = 0;

uint32_t led_set_addr;
uint32_t led_clr_addr;
uint32_t gpio3_reg_oe_addr;

led_set_addr = GPIO3_BASE_ADDR + GPIO_SETDATAOUT_OFFSET;
led_clr_addr = GPIO3_BASE_ADDR + GPIO_CLRDATAOUT_OFFSET;
gpio3_reg_oe_addr = GPIO3_BASE_ADDR + GPIO_OE_OFFSET;

*(uint32_t*)led_clr_addr |= 1 << 19; //turn down LED0 (GPIO3_19)
*(uint32_t*)gpio3_reg_oe_addr &= ~(1<<21 | 1<< 20 | 1<<19); // gpio3_19/gpio3_20/gpio3_21 as output pin

/* pinmux configuration */
*(uint32_t*)CTRL_CORE_PAD_VIN1A_D15_ADDR = (PIN_OUTPUT_PULLUP | MUX_MODE14);
*(uint32_t*)CTRL_CORE_PAD_VIN1A_D16_ADDR = (PIN_OUTPUT_PULLUP | MUX_MODE14);
*(uint32_t*)CTRL_CORE_PAD_VIN1A_D17_ADDR = (PIN_OUTPUT_PULLUP | MUX_MODE14);

while(1) {

         for (i = 0; i < 3; i++) {
            value = 1 << (i + 19);
            *(uint32_t*)led_set_addr |= value;
            __delay_cycles(100000000); // half-second delay
            *(uint32_t*)led_clr_addr |= value;
            __delay_cycles(100000000); // half-second delay
         }
}
   /* Halt the PRU core - shouldn't get here */
   //__halt();
}

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