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Better baseline keeping

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whowechina 2023-10-15 21:12:38 +08:00
parent d5cbff6d10
commit f433d961db
2 changed files with 12 additions and 12 deletions
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Production/Firmware/chu_pico.uf2
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24
firmware/src/mpr121.c
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@ -80,21 +80,21 @@ void mpr121_init(uint8_t i2c_addr)
//touch pad baseline filter
//rising: baseline quick rising
write_reg(i2c_addr, 0x2B, 0x01); // Max half delta Rising
write_reg(i2c_addr, 0x2C, 0x01); // Noise half delta Rising
write_reg(i2c_addr, 0x2D, 0x00); // Noise count limit Rising
write_reg(i2c_addr, 0x2E, 0x00); // Delay limit Rising
write_reg(i2c_addr, 0x2B, 1); // Max half delta Rising
write_reg(i2c_addr, 0x2C, 1); // Noise half delta Rising
write_reg(i2c_addr, 0x2D, 1); // Noise count limit Rising
write_reg(i2c_addr, 0x2E, 1); // Delay limit Rising
//falling: baseline slow falling
write_reg(i2c_addr, 0x2F, 0x01); // Max half delta Falling
write_reg(i2c_addr, 0x30, 0x01); // Noise half delta Falling
write_reg(i2c_addr, 0x31, 0xFF); // Noise count limit Falling
write_reg(i2c_addr, 0x32, 0x0F); // Delay limit Falling
write_reg(i2c_addr, 0x2F, 1); // Max half delta Falling
write_reg(i2c_addr, 0x30, 1); // Noise half delta Falling
write_reg(i2c_addr, 0x31, 6); // Noise count limit Falling
write_reg(i2c_addr, 0x32, 12); // Delay limit Falling
//touched: baseline keep
write_reg(i2c_addr, 0x33, 0x00); // Noise half delta Touched
write_reg(i2c_addr, 0x34, 0x00); // Noise count Touched
write_reg(i2c_addr, 0x35, 0x00); // Delay limit Touched
//touched: baseline very slow falling
write_reg(i2c_addr, 0x33, 1); // Noise half delta Touched
write_reg(i2c_addr, 0x34, 8); // Noise count Touched
write_reg(i2c_addr, 0x35, 30); // Delay limit Touched
//Touch pad threshold
for (int i = 0; i < 12; i++) {