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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define ADK_INTERNAL
#include "LEDs.h"
#include "fwk.h"
static const uint8_t blanks[] = {PORTB(8), PORTC(25), PORTC(26), PORTC(27)};
#define MISO PORTA(25)
#define MOSI PORTA(26)
#define SCLK PORTA(27)
#define XLAT PORTA(28)
#define DBGLED PORTC(9)
static const uint16_t led_gamma[256] =
{
0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 8, 9, 11, 12, 14, 15, 17, 19,
21, 23, 25, 27, 29, 32, 34, 37, 40, 43, 46, 49, 52, 55, 59, 62, 66, 70, 73,
77, 82, 86, 90, 95, 99, 104, 109, 114, 119, 124, 129, 135, 140, 146, 152,
158, 164, 170, 176, 182, 189, 196, 202, 209, 216, 224, 231, 238, 246, 254,
261, 269, 277, 286, 294, 302, 311, 320, 328, 337, 347, 356, 365, 375, 384,
394, 404, 414, 424, 435, 445, 456, 467, 477, 488, 500, 511, 522, 534, 545,
557, 569, 581, 594, 606, 619, 631, 644, 657, 670, 683, 697, 710, 724, 738,
752, 766, 780, 794, 809, 823, 838, 853, 868, 884, 899, 914, 930, 946, 962,
978, 994, 1011, 1027, 1044, 1061, 1078, 1095, 1112, 1130, 1147, 1165, 1183,
1201, 1219, 1237, 1256, 1274, 1293, 1312, 1331, 1350, 1370, 1389, 1409,
1429, 1449, 1469, 1489, 1509, 1530, 1551, 1572, 1593, 1614, 1635, 1657,
1678, 1700, 1722, 1744, 1766, 1789, 1811, 1834, 1857, 1880, 1903, 1926,
1950, 1974, 1997, 2021, 2045, 2070, 2094, 2119, 2143, 2168, 2193, 2219,
2244, 2270, 2295, 2321, 2347, 2373, 2400, 2426, 2453, 2479, 2506, 2534,
2561, 2588, 2616, 2644, 2671, 2700, 2728, 2756, 2785, 2813, 2842, 2871,
2900, 2930, 2959, 2989, 3019, 3049, 3079, 3109, 3140, 3170, 3201, 3232,
3263, 3295, 3326, 3358, 3390, 3421, 3454, 3486, 3518, 3551, 3584, 3617,
3650, 3683, 3716, 3750, 3784, 3818, 3852, 3886, 3920, 3955, 3990, 4025,
4060, 4095
};
#define NUM_ROWS 4
#define XFERS_PER_LED 3
#define XFERS_PER_ROW ((NUM_LEDS) * (XFERS_PER_LED) / (NUM_ROWS))
const uint8_t digit_table[6] = {57, 41, 25, 50, 34, 18};
const uint8_t icon_table[8] = {49, 33, 17, 1, 48, 32, 16, 0};
const uint8_t seg_table[128] =
{
/* 0x00 - 0x0F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 0x10 - 0x1F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 0x20 - 0x2F */ 0x00, 0x6B, 0x22, 0x56, 0x64, 0x2D, 0x64, 0x02, 0x31, 0x07, 0x40, 0x40, 0x08, 0x40, 0x08, 0x52,
/* 0x30 - 0x3F */ 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, 0x08, 0x08, 0x58, 0x48, 0x4C, 0x0B,
/* 0x40 - 0x4F */ 0x63, 0x77, 0x7C, 0x58, 0x5E, 0x79, 0x71, 0x6F, 0x74, 0x10, 0x0E, 0x70, 0x38, 0x55, 0x54, 0x5C,
/* 0x50 - 0x5F */ 0x73, 0x67, 0x50, 0x6D, 0x78, 0x3E, 0x1C, 0x1D, 0x76, 0x6E, 0x5B, 0x59, 0x0F, 0x64, 0x23, 0x08,
/* 0x60 - 0x6F */ 0x20, 0x77, 0x7C, 0x58, 0x5E, 0x79, 0x71, 0x6F, 0x74, 0x10, 0x0E, 0x70, 0x38, 0x55, 0x54, 0x5C,
/* 0x70 - 0x7F */ 0x73, 0x67, 0x50, 0x6D, 0x78, 0x3E, 0x1C, 0x1D, 0x76, 0x6E, 0x5B, 0x46, 0x30, 0x70, 0x40, 0x00
};
static uint8_t row = 0;
static uint16_t led_buffer[192]={0,};
void SPI0_Handler(void){
//disable the interrupt
gpioSetVal(XLAT, 1);
SPI0->SPI_IDR = SPI_IER_TXEMPTY;
gpioSetVal(XLAT, 0);
gpioSetVal(blanks[row], 0);
}
void ledsInit(void){
uint8_t i;
//init SPI
SPI_Configure(SPI0, ID_SPI0, SPI_MR_MSTR | SPI_MR_MODFDIS | SPI_MR_PCS(0));
SPI_ConfigureNPCS(SPI0, 0 , SPI_CSR_NCPHA | SPI_CSR_BITS_12_BIT | SPI_CSR_SCBR(3) | SPI_CSR_DLYBS(2) | SPI_CSR_DLYBCT(0)); //30MHz spi speed
SPI_Enable(SPI0);
SPI0->SPI_IDR = 0xFFFFFFFF;
NVIC_EnableIRQ(SPI0_IRQn);
//init pins: SPI
gpioSetFun(MISO, GPIO_FUNC_A);
gpioSetFun(MOSI, GPIO_FUNC_A);
gpioSetFun(SCLK, GPIO_FUNC_A);
//init pins: debug LED
gpioSetFun(DBGLED, GPIO_FUNC_GPIO);
gpioSetDir(DBGLED, 0);
gpioSetVal(DBGLED, 0);
//init pins: latch
gpioSetFun(XLAT, GPIO_FUNC_GPIO);
gpioSetDir(XLAT, 0);
gpioSetVal(XLAT, 0);
//init pins: blanking
for(i = 0; i < sizeof(blanks); i++){
gpioSetFun(blanks[i], GPIO_FUNC_GPIO);
gpioSetDir(blanks[i], 0);
gpioSetVal(blanks[i], 1);
}
periodicAdd(ledUpdate, 0, 4);
}
void ledWrite(uint8_t led_id, uint8_t r, uint8_t g, uint8_t b){
if(led_id >= NUM_LEDS) return;
led_id += led_id << 1;
led_buffer[led_id++] = led_gamma[b];
led_buffer[led_id++] = led_gamma[g];
led_buffer[led_id++] = led_gamma[r];
}
void ledDrawIcon(uint8_t offset, uint8_t r, uint8_t g, uint8_t b){
ledWrite(icon_table[offset], r, g, b);
}
void ledDrawLetter(char letter, uint8_t val, uint8_t r, uint8_t g, uint8_t b){
uint8_t i;
uint8_t seg = seg_table[val];
uint8_t offset = digit_table[letter];
for (i = 0; i < 7; i++, seg <<= 1) ledWrite(i + offset, (seg & 64) ? r : 0, (seg & 64) ? g : 0, (seg & 64) ? b : 0);
}
void ledUpdate(void){
volatile uint16_t* row_data;
unsigned i;
gpioSetVal(blanks[row], 1);
if(++row == NUM_ROWS) row = 0;
row_data = led_buffer + XFERS_PER_ROW * row;
DMAC->DMAC_CH_NUM[DMA_CHANNEL_LEDS].DMAC_SADDR = (uint32_t)row_data;
DMAC->DMAC_CH_NUM[DMA_CHANNEL_LEDS].DMAC_DADDR = (uint32_t)&SPI0->SPI_TDR;
DMAC->DMAC_CH_NUM[DMA_CHANNEL_LEDS].DMAC_DSCR = 0;
DMAC->DMAC_CH_NUM[DMA_CHANNEL_LEDS].DMAC_CTRLA = DMAC_CTRLA_BTSIZE(XFERS_PER_ROW) | DMAC_CTRLA_SCSIZE_CHK_16 | DMAC_CTRLA_DCSIZE_CHK_1 | DMAC_CTRLA_SRC_WIDTH_HALF_WORD | DMAC_CTRLA_DST_WIDTH_HALF_WORD;
DMAC->DMAC_CH_NUM[DMA_CHANNEL_LEDS].DMAC_CTRLB = DMAC_CTRLB_FC_MEM2PER_DMA_FC | DMAC_CTRLB_SRC_INCR_INCREMENTING | DMAC_CTRLB_DST_INCR_FIXED;
DMAC->DMAC_CH_NUM[DMA_CHANNEL_LEDS].DMAC_CFG = DMAC_CFG_DST_PER(1) | DMAC_CFG_SRC_PER(1) | DMAC_CFG_DST_H2SEL_HW | DMAC_CFG_SOD | DMAC_CFG_FIFOCFG_ALAP_CFG;
DMAC->DMAC_CHER = (1 << DMA_CHANNEL_LEDS);
//wait for transfer to start
while(SPI0->SPI_SR & SPI_SR_TXEMPTY);
SPI0->SPI_IER = SPI_IER_TXEMPTY;
}
void ledDbgState(char on){
gpioSetVal(DBGLED, on);
}
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