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st7920 issue #1593

This commit is contained in:
kraus 2021-09-27 23:16:52 +02:00
parent 9c59e5941b
commit 76858f1018
2 changed files with 38 additions and 1 deletions
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1
csrc/u8x8.h
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@ -840,6 +840,7 @@ uint8_t u8x8_d_sh1107_pimoroni_128x128(u8x8_t *u8x8, uint8_t msg, uint8_t arg_in
uint8_t u8x8_d_sh1107_seeed_128x128(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8x8_d_sh1108_160x160(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8x8_d_sh1122_256x64(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8x8_d_st7920_256x32(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8x8_d_st7920_192x32(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8x8_d_st7920_128x64(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8x8_d_ssd1306_2040x16(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);

38
csrc/u8x8_d_st7920.c
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@ -229,8 +229,44 @@ uint8_t u8x8_d_st7920_128x64(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *a
return 1;
}
/* https://github.com/olikraus/u8g2/issues/1593 */
static const u8x8_display_info_t u8x8_st7920_256x32_display_info =
{
/* chip_enable_level = */ 1,
/* chip_disable_level = */ 0,
/* post_chip_enable_wait_ns = */ 5,
/* pre_chip_disable_wait_ns = */ 5,
/* reset_pulse_width_ms = */ 1,
/* post_reset_wait_ms = */ 6,
/* sda_setup_time_ns = */ 20,
/* sck_pulse_width_ns = */ 140, /* datasheet ST7920 */
/* sck_clock_hz = */ 1000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */
/* ST7920+Due work with 1MHz but not with 2MHz, ST7920+Uno works with 2MHz */
/* spi_mode = */ 3, /* active high, rising edge, 18 Aug 16: changed from 1 to 3 which works for 101 */
/* in theory mode 3 should be correct */
/* i2c_bus_clock_100kHz = */ 4,
/* data_setup_time_ns = */ 30,
/* write_pulse_width_ns = */ 40,
/* tile_width = */ 32,
/* tile_hight = */ 4,
/* default_x_offset = */ 0,
/* flipmode_x_offset = */ 0,
/* pixel_width = */ 256,
/* pixel_height = */ 32
};
uint8_t u8x8_d_st7920_256x32(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
switch(msg)
{
case U8X8_MSG_DISPLAY_SETUP_MEMORY:
u8x8_d_helper_display_setup_memory(u8x8, &u8x8_st7920_256x32_display_info);
break;
default:
return u8x8_d_st7920_common(u8x8, msg, arg_int, arg_ptr);
}
return 1;
}