ScStw/ESP32-HUB75-MatrixPanel-DMA
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Update ESP32-HUB75-MatrixPanel-I2S-DMA.h

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This commit is contained in:
mrfaptastic 2023-01-25 23:46:34 +00:00
parent 8337c7cf7e
commit ace8d938ee
1 changed files with 6 additions and 1 deletions
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7
src/ESP32-HUB75-MatrixPanel-I2S-DMA.h
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@ -202,7 +202,7 @@ struct HUB75_I2S_CFG {
/** /**
* I2S clock speed selector * I2S clock speed selector
*/ */
enum clk_speed {HZ_10M=10000000, HZ_15M=15000000, HZ_20M=20000000}; enum clk_speed {HZ_8M=8000000, HZ_10M=10000000, HZ_15M=15000000, HZ_20M=20000000};
// Structure Variables // Structure Variables
@ -342,6 +342,11 @@ class MatrixPanel_I2S_DMA {
if (m_cfg.driver) if (m_cfg.driver)
shiftDriver(m_cfg); shiftDriver(m_cfg);
#if defined(SPIRAM_DMA_BUFFER)
// Trick library into dropping colour depth slightly when using PSRAM.
// Actual output clockrate override occurs in configureDMA
m_cfg.i2sspeed = HUB75_I2S_CFG::HZ_8M;
#endif
/* As DMA buffers are dynamically allocated, we must allocated in begin() /* As DMA buffers are dynamically allocated, we must allocated in begin()
* Ref: https://github.com/espressif/arduino-esp32/issues/831 * Ref: https://github.com/espressif/arduino-esp32/issues/831