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77 lines
2.0 KiB
77 lines
2.0 KiB
#include "max2719.h"
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#include "dotmatrix.h"
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#include "malloc_safe.h"
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#include "com/debug.h"
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DotMatrix_Cfg* dmtx_init(DotMatrix_Init *init)
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{
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DotMatrix_Cfg *dmtx = calloc_s(1, sizeof(DotMatrix_Cfg));
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dmtx->drv.SPIx = init->SPIx;
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dmtx->drv.CS_GPIOx = init->CS_GPIOx;
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dmtx->drv.CS_PINx = init->CS_PINx;
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dmtx->drv.chain_len = init->cols * init->rows;
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dmtx->cols = init->cols;
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dmtx->rows = init->rows;
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dmtx->screen = calloc_s(init->cols * init->rows * 8, 1); // 8 bytes per driver
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_DECODE_MODE, 0x00); // no decode
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_SCAN_LIMIT, 0x07); // scan all 8
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_SHUTDOWN, 0x01); // not shutdown
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_DISPLAY_TEST, 0x00); // not test
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_INTENSITY, 0x07); // half intensity
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// clear
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for (uint8_t i = 0; i < 8; i++) {
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_DIGIT0+i, 0);
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}
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return dmtx;
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}
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void dmtx_show(DotMatrix_Cfg* dmtx)
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{
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for (uint8_t i = 0; i < 8; i++) {
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// show each digit's array in turn
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max2719_cmd_all_data(&dmtx->drv, MAX2719_CMD_DIGIT0+i, dmtx->screen + (i * dmtx->drv.chain_len));
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}
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}
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void dmtx_clear(DotMatrix_Cfg* dmtx)
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{
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memset(dmtx->screen, 0, dmtx->drv.chain_len*8);
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}
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void dmtx_intensity(DotMatrix_Cfg* dmtx, uint8_t intensity)
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{
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_INTENSITY, intensity & 0x0F);
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}
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void dmtx_blank(DotMatrix_Cfg* dmtx, bool blank)
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{
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max2719_cmd_all(&dmtx->drv, MAX2719_CMD_SHUTDOWN, blank & 0x01);
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}
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void dmtx_set(DotMatrix_Cfg* dmtx, int32_t x, int32_t y, bool bit)
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{
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if (x < 0 || y < 0) return;
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if ((uint32_t)x >= dmtx->cols*8 || (uint32_t)y >= dmtx->rows*8) return;
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uint32_t cell_x = (uint32_t)x >> 3;
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uint8_t xd = x & 7;
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// resolve cell
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uint32_t digit = y & 7;
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cell_x += ((uint32_t)y >> 3) * dmtx->cols;
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uint32_t cell_idx = (digit * dmtx->drv.chain_len) + cell_x;
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uint8_t *cell = &dmtx->screen[cell_idx];
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if (bit) {
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*cell |= bit << xd;
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} else {
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*cell &= ~(bit << xd);
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}
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}
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