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@ -36,7 +36,7 @@ |
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#endif |
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// Transfer buffer for TWITransmitData() |
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uint8_t g_twi_transfer_buffer[20]; |
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uint8_t g_twi_transfer_buffer[65]; |
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// These buffers match the CKLED2001 PWM registers. |
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// The control buffers match the PG0 LED On/Off registers. |
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@ -72,27 +72,26 @@ bool CKLED2001_write_register(uint8_t addr, uint8_t reg, uint8_t data) { |
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bool CKLED2001_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { |
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// Assumes PG1 is already selected. |
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// If any of the transactions fails function returns false. |
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// Transmit PWM registers in 12 transfers of 16 bytes. |
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// g_twi_transfer_buffer[] is 20 bytes |
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// Transmit PWM registers in 3 transfers of 64 bytes. |
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// Iterate over the pwm_buffer contents at 16 byte intervals. |
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for (int i = 0; i < 192; i += 16) { |
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// Iterate over the pwm_buffer contents at 64 byte intervals. |
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for (uint8_t i = 0; i < 192; i += 64) { |
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g_twi_transfer_buffer[0] = i; |
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// Copy the data from i to i+15. |
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// Copy the data from i to i+63. |
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// Device will auto-increment register for data after the first byte |
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// Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer. |
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for (int j = 0; j < 16; j++) { |
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for (uint8_t j = 0; j < 64; j++) { |
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g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j]; |
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} |
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#if CKLED2001_PERSISTENCE > 0 |
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for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) { |
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) { |
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 65, CKLED2001_TIMEOUT) != 0) { |
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return false; |
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} |
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} |
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#else |
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) { |
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if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 65, CKLED2001_TIMEOUT) != 0) { |
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return false; |
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} |
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#endif |
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