kuba/TEF6686_ESP32
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more dma in tft driver

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This commit is contained in:
KubaPro010
2026-01-18 23:05:06 +01:00
parent f9b53f170e
commit a3addcb21c
2 changed files with 95 additions and 40 deletions
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43
lib/TFT_eSPI/TFT_eSPI.h
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@@ -7,6 +7,47 @@
#define SPI_READ_FREQUENCY 20000000
#define SPI_TOUCH_FREQUENCY 2500000
#define SPI_SET_CLOCK_FREQ(target_freq_hz) \
do { \
uint32_t sys_freq = getApbFrequency(); \
if(sys_freq == target_freq_hz) { \
*_spi_clock = 1 << 31;\
return; \
} \
uint32_t pre_div = 1; \
uint32_t cnt_n = 1; \
\
/* Find optimal dividers: sys_freq / pre_div / cnt_n = target_freq */ \
uint32_t total_div = (sys_freq + (target_freq_hz) - 1) / (target_freq_hz); \
\
/* Try to balance pre_div and cnt_n for best accuracy */ \
for (uint32_t p = 1; p <= 0x2000; p++) { \
uint32_t c = (total_div + p - 1) / p; \
if (c >= 1 && c <= 0x40) { \
pre_div = p; \
cnt_n = c; \
break; \
} \
} \
\
/* Adjust to register format (values are minus one) */ \
pre_div = (pre_div > 1) ? (pre_div - 1) : 0; \
cnt_n = (cnt_n > 1) ? (cnt_n - 1) : 0; \
\
/* Calculate cnt_h for 50% duty cycle */ \
uint32_t cnt_h = (cnt_n > 0) ? ((cnt_n + 1) / 2 - 1) : 0; \
\
/* Build register value */ \
uint32_t reg_val = 0; \
reg_val |= (0 << 31); /* SPI_CLK_EQU_SYSCLK = 0 (use dividers) */ \
reg_val |= (pre_div << 18); /* SPI_CLKDIV_PRE */ \
reg_val |= (cnt_n << 12); /* SPI_CLKCNT_N */ \
reg_val |= (cnt_h << 6); /* SPI_CLKCNT_H */ \
reg_val |= (cnt_n << 0); /* SPI_CLKCNT_L = SPI_CLKCNT_N */ \
\
*_spi_clock = reg_val; \
} while(0)
#define TFT_WIDTH 240
#define TFT_HEIGHT 320
@@ -72,7 +113,7 @@
// Write same value twice
#define tft_Write_32D(C) TFT_WRITE_BITS((uint16_t)((C)<<8 | (C)>>8)<<16 | (uint16_t)((C)<<8 | (C)>>8), 32)
#define tft_Read_8() spi.transfer(0)
#define tft_Read_8() transfer(0)
#define DAT8TO32(P) ( (uint32_t)P[0]<<8 | P[1] | P[2]<<24 | P[3]<<16 )