- /*
- Copyright 2018 Massdrop Inc.
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include "arm_atsam_protocol.h"
-
- #if !defined(MD_BOOTLOADER) && defined(RGB_MATRIX_ENABLE)
-
- # include <string.h>
-
- // From keyboard
- # include "config.h"
- # include "config_led.h"
- # include "matrix.h"
-
- # define I2C_LED_USE_DMA 1 // Set 1 to use background DMA transfers for leds, Set 0 to use inline software transfers
-
- DmacDescriptor dmac_desc;
- DmacDescriptor dmac_desc_wb;
-
- static uint8_t i2c_led_q[I2C_Q_SIZE]; // I2C queue circular buffer
- static uint8_t i2c_led_q_s; // Start of circular buffer
- static uint8_t i2c_led_q_e; // End of circular buffer
- static uint8_t i2c_led_q_full; // Queue full counter for reset
-
- static uint8_t dma_sendbuf[I2C_DMA_MAX_SEND]; // Data being written to I2C
-
- volatile uint8_t i2c_led_q_running;
-
- #endif // !defined(MD_BOOTLOADER) && defined(RGB_MATRIX_ENABLE)
-
- void i2c0_init(void) {
- DBGC(DC_I2C0_INIT_BEGIN);
-
- CLK_set_i2c0_freq(CHAN_SERCOM_I2C0, FREQ_I2C0_DEFAULT);
-
- // MCU
- PORT->Group[0].PMUX[4].bit.PMUXE = 2;
- PORT->Group[0].PMUX[4].bit.PMUXO = 2;
- PORT->Group[0].PINCFG[8].bit.PMUXEN = 1;
- PORT->Group[0].PINCFG[9].bit.PMUXEN = 1;
-
- // I2C
- // Note: SW Reset handled in CLK_set_i2c0_freq clks.c
-
- SERCOM0->I2CM.CTRLA.bit.MODE = 5; // Set master mode
-
- SERCOM0->I2CM.CTRLA.bit.SPEED = 0; // Set to 1 for Fast-mode Plus (FM+) up to 1 MHz
- SERCOM0->I2CM.CTRLA.bit.RUNSTDBY = 1; // Enabled
-
- SERCOM0->I2CM.CTRLA.bit.ENABLE = 1; // Enable the device
- while (SERCOM0->I2CM.SYNCBUSY.bit.ENABLE) {
- DBGC(DC_I2C0_INIT_SYNC_ENABLING);
- } // Wait for SYNCBUSY.ENABLE to clear
-
- SERCOM0->I2CM.STATUS.bit.BUSSTATE = 1; // Force into IDLE state
- while (SERCOM0->I2CM.SYNCBUSY.bit.SYSOP) {
- DBGC(DC_I2C0_INIT_SYNC_SYSOP);
- }
- while (SERCOM0->I2CM.STATUS.bit.BUSSTATE != 1) {
- DBGC(DC_I2C0_INIT_WAIT_IDLE);
- } // Wait while not idle
-
- DBGC(DC_I2C0_INIT_COMPLETE);
- }
-
- uint8_t i2c0_start(uint8_t address) {
- SERCOM0->I2CM.ADDR.bit.ADDR = address;
- while (SERCOM0->I2CM.SYNCBUSY.bit.SYSOP) {
- }
- while (SERCOM0->I2CM.INTFLAG.bit.MB == 0) {
- }
- while (SERCOM0->I2CM.STATUS.bit.RXNACK) {
- }
-
- return 1;
- }
-
- uint8_t i2c0_transmit(uint8_t address, uint8_t *data, uint16_t length, uint16_t timeout) {
- if (!length) return 0;
-
- i2c0_start(address);
-
- while (length) {
- SERCOM0->I2CM.DATA.bit.DATA = *data;
- while (SERCOM0->I2CM.INTFLAG.bit.MB == 0) {
- }
- while (SERCOM0->I2CM.STATUS.bit.RXNACK) {
- }
-
- data++;
- length--;
- }
-
- i2c0_stop();
-
- return 1;
- }
-
- void i2c0_stop(void) {
- if (SERCOM0->I2CM.STATUS.bit.CLKHOLD || SERCOM0->I2CM.INTFLAG.bit.MB == 1 || SERCOM0->I2CM.STATUS.bit.BUSSTATE != 1) {
- SERCOM0->I2CM.CTRLB.bit.CMD = 3;
- while (SERCOM0->I2CM.SYNCBUSY.bit.SYSOP)
- ;
- while (SERCOM0->I2CM.STATUS.bit.CLKHOLD)
- ;
- while (SERCOM0->I2CM.INTFLAG.bit.MB)
- ;
- while (SERCOM0->I2CM.STATUS.bit.BUSSTATE != 1)
- ;
- }
- }
-
- #if !defined(MD_BOOTLOADER) && defined(RGB_MATRIX_ENABLE)
- void i2c1_init(void) {
- DBGC(DC_I2C1_INIT_BEGIN);
-
- CLK_set_i2c1_freq(CHAN_SERCOM_I2C1, FREQ_I2C1_DEFAULT);
-
- /* MCU */
- PORT->Group[0].PMUX[8].bit.PMUXE = 2;
- PORT->Group[0].PMUX[8].bit.PMUXO = 2;
- PORT->Group[0].PINCFG[16].bit.PMUXEN = 1;
- PORT->Group[0].PINCFG[17].bit.PMUXEN = 1;
-
- /* I2C */
- // Note: SW Reset handled in CLK_set_i2c1_freq clks.c
-
- SERCOM1->I2CM.CTRLA.bit.MODE = 5; // MODE: Set master mode (No sync)
- SERCOM1->I2CM.CTRLA.bit.SPEED = 1; // SPEED: Fm+ up to 1MHz (No sync)
- SERCOM1->I2CM.CTRLA.bit.RUNSTDBY = 1; // RUNSTBY: Enabled (No sync)
-
- SERCOM1->I2CM.CTRLB.bit.SMEN = 1; // SMEN: Smart mode enabled (For DMA)(No sync)
-
- NVIC_EnableIRQ(SERCOM1_0_IRQn);
- SERCOM1->I2CM.INTENSET.bit.ERROR = 1;
-
- SERCOM1->I2CM.CTRLA.bit.ENABLE = 1; // ENABLE: Enable the device (sync SYNCBUSY.ENABLE)
- while (SERCOM1->I2CM.SYNCBUSY.bit.ENABLE) {
- DBGC(DC_I2C1_INIT_SYNC_ENABLING);
- } // Wait for SYNCBUSY.ENABLE to clear
-
- SERCOM1->I2CM.STATUS.bit.BUSSTATE = 1; // BUSSTATE: Force into IDLE state (sync SYNCBUSY.SYSOP)
- while (SERCOM1->I2CM.SYNCBUSY.bit.SYSOP) {
- DBGC(DC_I2C1_INIT_SYNC_SYSOP);
- }
- while (SERCOM1->I2CM.STATUS.bit.BUSSTATE != 1) {
- DBGC(DC_I2C1_INIT_WAIT_IDLE);
- } // Wait while not idle
-
- DBGC(DC_I2C1_INIT_COMPLETE);
- }
-
- uint8_t i2c1_start(uint8_t address) {
- SERCOM1->I2CM.ADDR.bit.ADDR = address;
- while (SERCOM1->I2CM.SYNCBUSY.bit.SYSOP) {
- }
- while (SERCOM1->I2CM.INTFLAG.bit.MB == 0) {
- }
- while (SERCOM1->I2CM.STATUS.bit.RXNACK) {
- }
-
- return 1;
- }
-
- uint8_t i2c1_transmit(uint8_t address, uint8_t *data, uint16_t length, uint16_t timeout) {
- if (!length) return 0;
-
- i2c1_start(address);
-
- while (length) {
- SERCOM1->I2CM.DATA.bit.DATA = *data;
- while (SERCOM1->I2CM.INTFLAG.bit.MB == 0) {
- }
- while (SERCOM1->I2CM.STATUS.bit.RXNACK) {
- }
-
- data++;
- length--;
- }
-
- i2c1_stop();
-
- return 1;
- }
-
- void i2c1_stop(void) {
- if (SERCOM1->I2CM.STATUS.bit.CLKHOLD || SERCOM1->I2CM.INTFLAG.bit.MB == 1 || SERCOM1->I2CM.STATUS.bit.BUSSTATE != 1) {
- SERCOM1->I2CM.CTRLB.bit.CMD = 3;
- while (SERCOM1->I2CM.SYNCBUSY.bit.SYSOP)
- ;
- while (SERCOM1->I2CM.STATUS.bit.CLKHOLD)
- ;
- while (SERCOM1->I2CM.INTFLAG.bit.MB)
- ;
- while (SERCOM1->I2CM.STATUS.bit.BUSSTATE != 1)
- ;
- }
- }
-
- void i2c_led_send_CRWL(uint8_t drvid) {
- uint8_t i2cdata[] = {ISSI3733_CMDRWL, ISSI3733_CMDRWL_WRITE_ENABLE_ONCE};
- i2c1_transmit(issidrv[drvid].addr, i2cdata, sizeof(i2cdata), 0);
- }
-
- void i2c_led_select_page(uint8_t drvid, uint8_t pageno) {
- uint8_t i2cdata[] = {ISSI3733_CMDR, pageno};
- i2c1_transmit(issidrv[drvid].addr, i2cdata, sizeof(i2cdata), 0);
- }
-
- void i2c_led_send_GCR(uint8_t drvid) {
- uint8_t i2cdata[] = {ISSI3733_GCCR, 0x00};
-
- if (gcr_actual > LED_GCR_MAX) gcr_actual = LED_GCR_MAX;
- i2cdata[1] = gcr_actual;
-
- i2c1_transmit(issidrv[drvid].addr, i2cdata, sizeof(i2cdata), 0);
- }
-
- void i2c_led_send_onoff(uint8_t drvid) {
- # if I2C_LED_USE_DMA != 1
- if (!i2c_led_q_running) {
- # endif
- i2c_led_send_CRWL(drvid);
- i2c_led_select_page(drvid, 0);
- # if I2C_LED_USE_DMA != 1
- }
- # endif
-
- *issidrv[drvid].onoff = 0; // Force start location offset to zero
- i2c1_transmit(issidrv[drvid].addr, issidrv[drvid].onoff, ISSI3733_PG0_BYTES, 0);
- }
-
- void i2c_led_send_mode_op_gcr(uint8_t drvid, uint8_t mode, uint8_t operation) {
- uint8_t i2cdata[] = {ISSI3733_CR, mode | operation, gcr_actual};
- i2c1_transmit(issidrv[drvid].addr, i2cdata, sizeof(i2cdata), 0);
- }
-
- void i2c_led_send_pur_pdr(uint8_t drvid, uint8_t pur, uint8_t pdr) {
- uint8_t i2cdata[] = {ISSI3733_SWYR_PUR, pur, pdr};
-
- i2c1_transmit(issidrv[drvid].addr, i2cdata, sizeof(i2cdata), 0);
- }
-
- void i2c_led_send_pwm(uint8_t drvid) {
- # if I2C_LED_USE_DMA != 1
- if (!i2c_led_q_running) {
- # endif
- i2c_led_send_CRWL(drvid);
- i2c_led_select_page(drvid, 0);
- # if I2C_LED_USE_DMA != 1
- }
- # endif
-
- *issidrv[drvid].pwm = 0; // Force start location offset to zero
- i2c1_transmit(issidrv[drvid].addr, issidrv[drvid].pwm, ISSI3733_PG1_BYTES, 0);
- }
-
- uint8_t I2C3733_Init_Control(void) {
- DBGC(DC_I2C3733_INIT_CONTROL_BEGIN);
-
- // Hardware state shutdown on boot
- // USB state machine will enable driver when communication is ready
- I2C3733_Control_Set(0);
-
- wait_ms(1);
-
- sr_exp_data.bit.IRST = 0;
- SR_EXP_WriteData();
-
- wait_ms(1);
-
- DBGC(DC_I2C3733_INIT_CONTROL_COMPLETE);
-
- return 1;
- }
-
- uint8_t I2C3733_Init_Drivers(void) {
- DBGC(DC_I2C3733_INIT_DRIVERS_BEGIN);
-
- gcr_actual = ISSI3733_GCR_DEFAULT;
- gcr_actual_last = gcr_actual;
-
- if (gcr_actual > LED_GCR_MAX) gcr_actual = LED_GCR_MAX;
- gcr_desired = gcr_actual;
-
- // Set up master device
- i2c_led_send_CRWL(0);
- i2c_led_select_page(0, 3);
- i2c_led_send_mode_op_gcr(0, 0, ISSI3733_CR_SSD_NORMAL); // No SYNC due to brightness mismatch with second driver
-
- // Set up slave device
- i2c_led_send_CRWL(1);
- i2c_led_select_page(1, 3);
- i2c_led_send_mode_op_gcr(1, 0, ISSI3733_CR_SSD_NORMAL); // No SYNC due to brightness mismatch with first driver and slight flicker at rgb values 1,2
-
- i2c_led_send_CRWL(0);
- i2c_led_select_page(0, 3);
- i2c_led_send_pur_pdr(0, ISSI3733_SWYR_PUR_8000, ISSI3733_CSXR_PDR_8000);
-
- i2c_led_send_CRWL(1);
- i2c_led_select_page(1, 3);
- i2c_led_send_pur_pdr(1, ISSI3733_SWYR_PUR_8000, ISSI3733_CSXR_PDR_8000);
-
- DBGC(DC_I2C3733_INIT_DRIVERS_COMPLETE);
-
- return 1;
- }
-
- void I2C_DMAC_LED_Init(void) {
- Dmac *dmac = DMAC;
-
- DBGC(DC_I2C_DMAC_LED_INIT_BEGIN);
-
- // Disable device
- dmac->CTRL.bit.DMAENABLE = 0; // Disable DMAC
- while (dmac->CTRL.bit.DMAENABLE) {
- } // Wait for disabled state in case of ongoing transfers
- dmac->CTRL.bit.SWRST = 1; // Software Reset DMAC
- while (dmac->CTRL.bit.SWRST) {
- } // Wait for software reset to complete
-
- // Configure device
- dmac->BASEADDR.reg = (uint32_t)&dmac_desc; // Set descriptor base address
- dmac->WRBADDR.reg = (uint32_t)&dmac_desc_wb; // Set descriptor write back address
- dmac->CTRL.reg |= 0x0f00; // Handle all priorities (LVL0-3)
-
- // Disable channel
- dmac->Channel[0].CHCTRLA.bit.ENABLE = 0; // Disable the channel
- while (dmac->Channel[0].CHCTRLA.bit.ENABLE) {
- } // Wait for disabled state in case of ongoing transfers
- dmac->Channel[0].CHCTRLA.bit.SWRST = 1; // Software Reset the channel
- while (dmac->Channel[0].CHCTRLA.bit.SWRST) {
- } // Wait for software reset to complete
-
- // Configure channel
- dmac->Channel[0].CHCTRLA.bit.THRESHOLD = 0; // 1BEAT
- dmac->Channel[0].CHCTRLA.bit.BURSTLEN = 0; // SINGLE
- dmac->Channel[0].CHCTRLA.bit.TRIGACT = 2; // BURST
- dmac->Channel[0].CHCTRLA.bit.TRIGSRC = SERCOM1_DMAC_ID_TX; // Trigger source
- dmac->Channel[0].CHCTRLA.bit.RUNSTDBY = 1; // Run in standby
-
- NVIC_EnableIRQ(DMAC_0_IRQn);
- dmac->Channel[0].CHINTENSET.bit.TCMPL = 1;
- dmac->Channel[0].CHINTENSET.bit.TERR = 1;
-
- // Enable device
- dmac->CTRL.bit.DMAENABLE = 1; // Enable DMAC
- while (dmac->CTRL.bit.DMAENABLE == 0) {
- } // Wait for enable state
-
- DBGC(DC_I2C_DMAC_LED_INIT_COMPLETE);
- }
-
- // state = 1 enable
- // state = 0 disable
- void I2C3733_Control_Set(uint8_t state) {
- DBGC(DC_I2C3733_CONTROL_SET_BEGIN);
-
- sr_exp_data.bit.SDB_N = (state == 1 ? 1 : 0);
- SR_EXP_WriteData();
-
- DBGC(DC_I2C3733_CONTROL_SET_COMPLETE);
- }
-
- void i2c_led_desc_defaults(void) {
- dmac_desc.BTCTRL.bit.STEPSIZE = 0; // SRCINC used in favor for auto 1 inc
- dmac_desc.BTCTRL.bit.STEPSEL = 0; // SRCINC used in favor for auto 1 inc
- dmac_desc.BTCTRL.bit.DSTINC = 0; // The Destination Address Increment is disabled
- dmac_desc.BTCTRL.bit.SRCINC = 1; // The Source Address Increment is enabled (Inc by 1)
- dmac_desc.BTCTRL.bit.BEATSIZE = 0; // 8-bit bus transfer
- dmac_desc.BTCTRL.bit.BLOCKACT = 0; // Channel will be disabled if it is the last block transfer in the transaction
- dmac_desc.BTCTRL.bit.EVOSEL = 0; // Event generation disabled
- dmac_desc.BTCTRL.bit.VALID = 1; // Set dmac valid
- }
-
- void i2c_led_prepare_send_dma(uint8_t *data, uint8_t len) {
- i2c_led_desc_defaults();
-
- dmac_desc.BTCNT.reg = len;
- dmac_desc.SRCADDR.reg = (uint32_t)data + len;
- dmac_desc.DSTADDR.reg = (uint32_t)&SERCOM1->I2CM.DATA.reg;
- dmac_desc.DESCADDR.reg = 0;
- }
-
- void i2c_led_begin_dma(uint8_t drvid) {
- DMAC->Channel[0].CHCTRLA.bit.ENABLE = 1; // Enable the channel
-
- SERCOM1->I2CM.ADDR.reg = (dmac_desc.BTCNT.reg << 16) | 0x2000 | issidrv[drvid].addr; // Begin transfer
- }
-
- void i2c_led_send_CRWL_dma(uint8_t drvid) {
- *(dma_sendbuf + 0) = ISSI3733_CMDRWL;
- *(dma_sendbuf + 1) = ISSI3733_CMDRWL_WRITE_ENABLE_ONCE;
- i2c_led_prepare_send_dma(dma_sendbuf, 2);
-
- i2c_led_begin_dma(drvid);
- }
-
- void i2c_led_select_page_dma(uint8_t drvid, uint8_t pageno) {
- *(dma_sendbuf + 0) = ISSI3733_CMDR;
- *(dma_sendbuf + 1) = pageno;
- i2c_led_prepare_send_dma(dma_sendbuf, 2);
-
- i2c_led_begin_dma(drvid);
- }
-
- void i2c_led_send_GCR_dma(uint8_t drvid) {
- *(dma_sendbuf + 0) = ISSI3733_GCCR;
- *(dma_sendbuf + 1) = gcr_actual;
- i2c_led_prepare_send_dma(dma_sendbuf, 2);
-
- i2c_led_begin_dma(drvid);
- }
-
- void i2c_led_send_pwm_dma(uint8_t drvid) {
- // Note: This copies the CURRENT pwm buffer, which may be getting modified
- memcpy(dma_sendbuf, issidrv[drvid].pwm, ISSI3733_PG1_BYTES);
- *dma_sendbuf = 0; // Force start location offset to zero
- i2c_led_prepare_send_dma(dma_sendbuf, ISSI3733_PG1_BYTES);
-
- i2c_led_begin_dma(drvid);
- }
-
- void i2c_led_send_onoff_dma(uint8_t drvid) {
- // Note: This copies the CURRENT onoff buffer, which may be getting modified
- memcpy(dma_sendbuf, issidrv[drvid].onoff, ISSI3733_PG0_BYTES);
- *dma_sendbuf = 0; // Force start location offset to zero
- i2c_led_prepare_send_dma(dma_sendbuf, ISSI3733_PG0_BYTES);
-
- i2c_led_begin_dma(drvid);
- }
-
- void i2c_led_q_init(void) {
- memset(i2c_led_q, 0, I2C_Q_SIZE);
- i2c_led_q_s = 0;
- i2c_led_q_e = 0;
- i2c_led_q_running = 0;
- i2c_led_q_full = 0;
- }
-
- uint8_t i2c_led_q_isempty(void) { return i2c_led_q_s == i2c_led_q_e; }
-
- uint8_t i2c_led_q_size(void) { return (i2c_led_q_e - i2c_led_q_s) % I2C_Q_SIZE; }
-
- uint8_t i2c_led_q_available(void) {
- return I2C_Q_SIZE - i2c_led_q_size() - 1; // Never allow end to meet start
- }
-
- void i2c_led_q_add(uint8_t cmd) {
- // WARNING: Always request room before adding commands!
-
- // Assign command
- i2c_led_q[i2c_led_q_e] = cmd;
-
- i2c_led_q_e = (i2c_led_q_e + 1) % I2C_Q_SIZE; // Move end up one or wrap
- }
-
- void i2c_led_q_s_advance(void) {
- i2c_led_q_s = (i2c_led_q_s + 1) % I2C_Q_SIZE; // Move start up one or wrap
- }
-
- // Always request room before adding commands
- // PS: In case the queue somehow gets filled, it will reset if it can not clear up
- // PS: Could only get this to happen through unrealistic timings to overload the I2C bus
- uint8_t i2c_led_q_request_room(uint8_t request_size) {
- if (request_size > i2c_led_q_available()) {
- i2c_led_q_full++;
-
- if (i2c_led_q_full >= 100) // Give the queue a chance to clear up
- {
- DBG_LED_ON;
- I2C_DMAC_LED_Init();
- i2c_led_q_init();
- return 1;
- }
-
- return 0;
- }
-
- i2c_led_q_full = 0;
-
- return 1;
- }
-
- uint8_t i2c_led_q_run(void) {
- if (i2c_led_q_isempty()) {
- i2c_led_q_running = 0;
- return 0;
- }
-
- if (i2c_led_q_running) return 1;
-
- i2c_led_q_running = 1;
-
- # if I2C_LED_USE_DMA != 1
- while (!i2c_led_q_isempty()) {
- # endif
- // run command
- if (i2c_led_q[i2c_led_q_s] == I2C_Q_CRWL) {
- i2c_led_q_s_advance();
- uint8_t drvid = i2c_led_q[i2c_led_q_s];
- # if I2C_LED_USE_DMA == 1
- i2c_led_send_CRWL_dma(drvid);
- # else
- i2c_led_send_CRWL(drvid);
- # endif
- } else if (i2c_led_q[i2c_led_q_s] == I2C_Q_PAGE_SELECT) {
- i2c_led_q_s_advance();
- uint8_t drvid = i2c_led_q[i2c_led_q_s];
- i2c_led_q_s_advance();
- uint8_t page = i2c_led_q[i2c_led_q_s];
- # if I2C_LED_USE_DMA == 1
- i2c_led_select_page_dma(drvid, page);
- # else
- i2c_led_select_page(drvid, page);
- # endif
- } else if (i2c_led_q[i2c_led_q_s] == I2C_Q_PWM) {
- i2c_led_q_s_advance();
- uint8_t drvid = i2c_led_q[i2c_led_q_s];
- # if I2C_LED_USE_DMA == 1
- i2c_led_send_pwm_dma(drvid);
- # else
- i2c_led_send_pwm(drvid);
- # endif
- } else if (i2c_led_q[i2c_led_q_s] == I2C_Q_GCR) {
- i2c_led_q_s_advance();
- uint8_t drvid = i2c_led_q[i2c_led_q_s];
- # if I2C_LED_USE_DMA == 1
- i2c_led_send_GCR_dma(drvid);
- # else
- i2c_led_send_GCR(drvid);
- # endif
- } else if (i2c_led_q[i2c_led_q_s] == I2C_Q_ONOFF) {
- i2c_led_q_s_advance();
- uint8_t drvid = i2c_led_q[i2c_led_q_s];
- # if I2C_LED_USE_DMA == 1
- i2c_led_send_onoff_dma(drvid);
- # else
- i2c_led_send_onoff(drvid);
- # endif
- }
-
- i2c_led_q_s_advance(); // Advance last run command or if the command byte was not serviced
-
- # if I2C_LED_USE_DMA != 1
- }
-
- i2c_led_q_running = 0;
- # endif
-
- return 1;
- }
-
- __attribute__((weak)) void i2c_init(void) {
- static bool is_initialised = false;
- if (!is_initialised) {
- is_initialised = true;
-
- i2c0_init();
- }
- }
-
- i2c_status_t i2c_transmit(uint8_t address, const uint8_t *data, uint16_t length, uint16_t timeout) {
- uint8_t ret = i2c0_transmit(address, (uint8_t *)data, length, timeout);
- SERCOM0->I2CM.CTRLB.bit.CMD = 0x03;
- while (SERCOM0->I2CM.SYNCBUSY.bit.SYSOP) {
- DBGC(DC_USB_WRITE2422_BLOCK_SYNC_SYSOP);
- }
- return ret ? I2C_STATUS_SUCCESS : I2C_STATUS_ERROR;
- }
-
- #endif // !defined(MD_BOOTLOADER) && defined(RGB_MATRIX_ENABLE)
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