the first effect
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2 changed files with 44 additions and 39 deletions
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/*
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* bitband.h
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*
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* Created on: Dec 14, 2018
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* Author: abody
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*/
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#ifndef BITBAND_H_
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#define BITBAND_H_
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#include <inttypes.h>
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#define RAM_BASE 0x20000000
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#define RAM_BB_BASE 0x22000000
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#define RAM_ResetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 0)
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#define RAM_SetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 1)
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#define RAM_GetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)))
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#define BITBAND_RAM(address, bit) ( (__IO uint32_t *) (RAM_BB_BASE + (((uint32_t)address) - RAM_BASE) * 32 + (bit) * 4))
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#define IO_BASE 0x20000000
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#define IO_BB_BASE 0x22000000
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#define IO_ResetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (IO_BB_BASE | ((VarAddr - IO_BASE) << 5) | ((BitNumber) << 2)) = 0)
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#define IO_SetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (IO_BB_BASE | ((VarAddr - IO_BASE) << 5) | ((BitNumber) << 2)) = 1)
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#define IO_GetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (IO_BB_BASE | ((VarAddr - IO_BASE) << 5) | ((BitNumber) << 2)))
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#define BITBAND_IO(address, bit) ( (__IO uint32_t *) (IO_BB_BASE + (((uint32_t)address) - IO_BASE) * 32 + (bit) * 4))
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#endif /* BITBAND_H_ */
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48
Src/main.c
48
Src/main.c
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#include "gpio.h"
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/* USER CODE BEGIN Includes */
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#include "bitband.h"
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#include <string.h>
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/* USER CODE END Includes */
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/* Private variables ---------------------------------------------------------*/
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/* USER CODE BEGIN PV */
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/* Private variables ---------------------------------------------------------*/
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#define NUMPIXELS 144
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volatile uint8_t g_done = 0;
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uint8_t g_ledBytes[] = {0, 0xff, 0, 0xff, 0x55, 0xaa};
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uint8_t g_ledBits[sizeof(g_ledBytes) * 8 / 2 + 1];
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typedef struct {
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uint8_t g;
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uint8_t r;
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uint8_t b;
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} pixel_t;
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pixel_t g_pixels[NUMPIXELS];
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uint8_t g_ledBits[sizeof(g_pixels) * 8 / 2 + 1];
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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@ -113,19 +119,45 @@ int main(void)
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MX_DMA_Init();
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MX_SPI1_Init();
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/* USER CODE BEGIN 2 */
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convert(g_ledBytes, g_ledBits, sizeof(g_ledBytes));
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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#define BRIGHTNESS 2
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#define DELAY 10
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g_ledBits[sizeof(g_ledBits)-1] = 0;
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memset(g_pixels, 0, sizeof(g_pixels));
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while(1)
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{
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HAL_StatusTypeDef st;
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g_ledBits[sizeof(g_ledBits)-1] = 0;
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st = HAL_SPI_Transmit_DMA(&hspi1, g_ledBits, sizeof(g_ledBits));
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for(uint16_t idx=0; idx < NUMPIXELS; idx++)
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{
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if(idx % 3 == 0) g_pixels[idx].r = BRIGHTNESS;
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else if(idx % 3 == 1) g_pixels[idx].g = BRIGHTNESS;
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else g_pixels[idx].b = BRIGHTNESS;
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convert((uint8_t*)g_pixels, g_ledBits, sizeof(g_pixels));
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HAL_SPI_Transmit_DMA(&hspi1, g_ledBits, sizeof(g_ledBits));
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while(!g_done);
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HAL_Delay(1);
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HAL_Delay(DELAY);
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}
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for(uint16_t idx=0; idx < NUMPIXELS; idx++)
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{
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if(idx % 3 == 0) g_pixels[idx].r = 0;
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else if(idx % 3 == 1) g_pixels[idx].g = 0;
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else g_pixels[idx].b = 0;
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convert((uint8_t*)g_pixels, g_ledBits, sizeof(g_pixels));
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HAL_SPI_Transmit_DMA(&hspi1, g_ledBits, sizeof(g_ledBits));
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while(!g_done);
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HAL_Delay(DELAY);
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}
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/* USER CODE END WHILE */
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