Jurica Resetar / Mbed OS acn52832_LANC_BLE

Sony's LANC camera control protocol project.

Dependencies:   aconno_LANC aconno_bsp aconno_SEGGER_RTT

main.cpp@2:b28027b9c099, 2017-11-01 (annotated)

Committer:
jurica238814
Date:
Wed Nov 01 11:53:16 2017 +0000
Revision:
2:b28027b9c099
Parent:
1:3e3dded8192f
Child:
3:eb5b87baf6cf
Problems with timing.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jurica238814 0:d616ca59aad8 1 /*
jurica238814 0:d616ca59aad8 2 * Example to demonstrate usage of the nrf52's I2S interface
jurica238814 0:d616ca59aad8 3 *
jurica238814 0:d616ca59aad8 4 * Made by Jurica Resetar @ aconno
jurica238814 0:d616ca59aad8 5 * jurica_resetar@yahoo.com
jurica238814 0:d616ca59aad8 6 * More info @ aconno.de
jurica238814 0:d616ca59aad8 7 *
jurica238814 0:d616ca59aad8 8 * All rights reserved
jurica238814 0:d616ca59aad8 9 *
jurica238814 0:d616ca59aad8 10 */
jurica238814 0:d616ca59aad8 11
jurica238814 0:d616ca59aad8 12 #include "mbed.h"
jurica238814 0:d616ca59aad8 13 #include "acd52832_bsp.h"
jurica238814 0:d616ca59aad8 14
jurica238814 2:b28027b9c099 15 #define MY_BUF_SIZE 13*8
jurica238814 1:3e3dded8192f 16 #define LANC_H 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF /* 13 B */
jurica238814 2:b28027b9c099 17 #define LANC_H_L 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF /* 13 B */
jurica238814 1:3e3dded8192f 18 #define LANC_L 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* 13 B */
jurica238814 0:d616ca59aad8 19
jurica238814 0:d616ca59aad8 20 /*
jurica238814 0:d616ca59aad8 21 * Bitovi na I2S bus idu od MSBa do LSBa
jurica238814 0:d616ca59aad8 22 */
jurica238814 0:d616ca59aad8 23
jurica238814 1:3e3dded8192f 24 #define REC_CMD_1 (0xE7) // 0xE7 or 0x18
jurica238814 1:3e3dded8192f 25 #define REC_CMD_2 (0xCC) // 0xCC or 0x33
jurica238814 1:3e3dded8192f 26
jurica238814 2:b28027b9c099 27 #define LANC_COMMAND_PIN (p2) // Pin connected to Tr to pull lanc bus down/up 2/26
jurica238814 2:b28027b9c099 28 #define LANC_PIN (p3) // Lanc bus pin (to scan for START/STOP bits) 3/25
jurica238814 0:d616ca59aad8 29
jurica238814 1:3e3dded8192f 30 DigitalOut led(p22);
jurica238814 2:b28027b9c099 31 DigitalOut alive(p24);
jurica238814 2:b28027b9c099 32
jurica238814 2:b28027b9c099 33 uint8_t normalCommand[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_L,LANC_L,LANC_L,LANC_H, LANC_H,LANC_L,LANC_L,LANC_L};
jurica238814 2:b28027b9c099 34 //uint8_t startStop[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_L,LANC_L,LANC_H,LANC_H,LANC_L,LANC_L,LANC_H,LANC_H_L};
jurica238814 2:b28027b9c099 35 //uint8_t normalCommand[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_L,LANC_H,LANC_H,LANC_L, LANC_L,LANC_H,LANC_H,LANC_H};
jurica238814 2:b28027b9c099 36 uint8_t startStop[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_H,LANC_H,LANC_L,LANC_L,LANC_H,LANC_H,LANC_L,LANC_L};
jurica238814 1:3e3dded8192f 37
jurica238814 2:b28027b9c099 38 uint32_t *normalCmdAddr = (uint32_t*)normalCommand;
jurica238814 2:b28027b9c099 39 uint32_t *startStopAddr = (uint32_t*)startStop;
jurica238814 2:b28027b9c099 40
jurica238814 2:b28027b9c099 41 uint8_t firstInt = 1;
jurica238814 2:b28027b9c099 42 uint8_t flag = 0;
jurica238814 2:b28027b9c099 43 uint8_t state = 0; /* 0 -> Send command type, 1-> send command */
jurica238814 1:3e3dded8192f 44 InterruptIn button(LANC_PIN);
jurica238814 2:b28027b9c099 45 Timer lancTimer;
jurica238814 2:b28027b9c099 46 Timer frameTimer;
jurica238814 1:3e3dded8192f 47
jurica238814 0:d616ca59aad8 48
jurica238814 2:b28027b9c099 49 void sendCommand(void){
jurica238814 2:b28027b9c099 50 static int timePassed_ms = 0;
jurica238814 2:b28027b9c099 51 static int lastIntTime_ms = 0;
jurica238814 1:3e3dded8192f 52
jurica238814 2:b28027b9c099 53 /*
jurica238814 2:b28027b9c099 54 * Na prvi interrupt pokreni frameTimer.
jurica238814 2:b28027b9c099 55 * Na svaki interrupt (falling edge na Lanc busu) izmjeri vrijeme od zadnjeg eventa
jurica238814 2:b28027b9c099 56 * Ako je to vrijeme > 5ms, onda je upravo taj prekid izazvao start bit novog framea
jurica238814 2:b28027b9c099 57 * U tom slučaju, kreni s donjim kodom, inaće nemoj ništa slati
jurica238814 2:b28027b9c099 58 */
jurica238814 2:b28027b9c099 59 if(firstInt){
jurica238814 2:b28027b9c099 60 firstInt = 0;
jurica238814 2:b28027b9c099 61 frameTimer.start();
jurica238814 2:b28027b9c099 62 }
jurica238814 2:b28027b9c099 63
jurica238814 2:b28027b9c099 64 lastIntTime_ms = frameTimer.read_ms() - lastIntTime_ms;
jurica238814 2:b28027b9c099 65 frameTimer.reset();
jurica238814 1:3e3dded8192f 66
jurica238814 2:b28027b9c099 67 if(lastIntTime_ms > 15){
jurica238814 2:b28027b9c099 68 state = 0;
jurica238814 2:b28027b9c099 69 if(!state){
jurica238814 2:b28027b9c099 70 lancTimer.start();
jurica238814 2:b28027b9c099 71 }
jurica238814 2:b28027b9c099 72 state++;
jurica238814 2:b28027b9c099 73
jurica238814 2:b28027b9c099 74 if(state == 1){
jurica238814 2:b28027b9c099 75 NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr;
jurica238814 2:b28027b9c099 76 }
jurica238814 2:b28027b9c099 77 else if(state == 2){
jurica238814 2:b28027b9c099 78 NRF_I2S->TXD.PTR = (uint32_t)startStopAddr;
jurica238814 2:b28027b9c099 79 }
jurica238814 2:b28027b9c099 80
jurica238814 2:b28027b9c099 81 if(state<=2){
jurica238814 2:b28027b9c099 82 __disable_irq();
jurica238814 2:b28027b9c099 83 // First or second start bit
jurica238814 2:b28027b9c099 84 wait_us(60); // Small delay for first bit after start bit
jurica238814 2:b28027b9c099 85 NRF_I2S->EVENTS_TXPTRUPD = 0;
jurica238814 2:b28027b9c099 86 NRF_I2S->ENABLE = 1;
jurica238814 2:b28027b9c099 87 NRF_I2S->TASKS_START = 1;
jurica238814 2:b28027b9c099 88 flag = 1;
jurica238814 2:b28027b9c099 89 }
jurica238814 2:b28027b9c099 90 else{
jurica238814 2:b28027b9c099 91 timePassed_ms = lancTimer.read_ms();
jurica238814 2:b28027b9c099 92 if(timePassed_ms > 8){
jurica238814 2:b28027b9c099 93 lancTimer.reset();
jurica238814 2:b28027b9c099 94 timePassed_ms = 0;
jurica238814 2:b28027b9c099 95 //state = 0;
jurica238814 2:b28027b9c099 96 }
jurica238814 2:b28027b9c099 97 }
jurica238814 2:b28027b9c099 98 }
jurica238814 1:3e3dded8192f 99 }
jurica238814 1:3e3dded8192f 100
jurica238814 1:3e3dded8192f 101
jurica238814 1:3e3dded8192f 102
jurica238814 0:d616ca59aad8 103 int main(void){
jurica238814 1:3e3dded8192f 104 led = 1;
jurica238814 2:b28027b9c099 105 alive = 0;
jurica238814 1:3e3dded8192f 106
jurica238814 0:d616ca59aad8 107 NRF_I2S->CONFIG.RXEN = 0; // Disable reception
jurica238814 0:d616ca59aad8 108 NRF_I2S->CONFIG.MCKEN = 1; // Enable MCK generator
jurica238814 0:d616ca59aad8 109
jurica238814 0:d616ca59aad8 110 //NRF_I2S->CONFIG.MCKFREQ = 0x04100000; // DIV 63
jurica238814 0:d616ca59aad8 111 //NRF_I2S->CONFIG.RATIO = 0; // Ratio = 32x
jurica238814 1:3e3dded8192f 112 NRF_I2S->CONFIG.MCKFREQ = 0x10000000; // DIV 31
jurica238814 1:3e3dded8192f 113 NRF_I2S->CONFIG.RATIO = 0; // Ratio = 32x
jurica238814 0:d616ca59aad8 114
jurica238814 1:3e3dded8192f 115 NRF_I2S->CONFIG.SWIDTH = 0; // Sample width = 8 bit
jurica238814 1:3e3dded8192f 116 NRF_I2S->CONFIG.ALIGN = 0; // Alignment = Right
jurica238814 0:d616ca59aad8 117 NRF_I2S->CONFIG.FORMAT = 0; // Format = I2S
jurica238814 0:d616ca59aad8 118 NRF_I2S->CONFIG.CHANNELS = 0; // Use stereo
jurica238814 0:d616ca59aad8 119
jurica238814 0:d616ca59aad8 120
jurica238814 1:3e3dded8192f 121
jurica238814 0:d616ca59aad8 122 // In debug mode
jurica238814 1:3e3dded8192f 123 NRF_I2S->PSEL.LRCK = 27; // LRCK routed to pin 26
jurica238814 1:3e3dded8192f 124 NRF_I2S->PSEL.SDOUT = LANC_COMMAND_PIN; // SDOUT routed to pin 28
jurica238814 1:3e3dded8192f 125 NRF_I2S->PSEL.SCK = 30; // SCK routed to pin 30
jurica238814 1:3e3dded8192f 126 NRF_I2S->PSEL.MCK = 0x80000000; // MCK disconnected
jurica238814 1:3e3dded8192f 127 NRF_I2S->PSEL.SDIN = 0x80000000; // SDIN disconnected
jurica238814 0:d616ca59aad8 128
jurica238814 2:b28027b9c099 129 NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr;
jurica238814 2:b28027b9c099 130 NRF_I2S->RXTXD.MAXCNT = MY_BUF_SIZE/4; // Div with 4 cuz that's number of 32 bit words
jurica238814 2:b28027b9c099 131
jurica238814 2:b28027b9c099 132
jurica238814 1:3e3dded8192f 133
jurica238814 1:3e3dded8192f 134 //NRF_I2S->ENABLE = 1;
jurica238814 0:d616ca59aad8 135 //NRF_I2S->TASKS_START = 1;
jurica238814 0:d616ca59aad8 136
jurica238814 1:3e3dded8192f 137 button.fall(sendCommand);
jurica238814 0:d616ca59aad8 138 while(1){
jurica238814 2:b28027b9c099 139 if(flag){
jurica238814 2:b28027b9c099 140 /*
jurica238814 2:b28027b9c099 141 if(state == 1){
jurica238814 2:b28027b9c099 142 NRF_I2S->TXD.PTR = (uint32_t)startStopAddr;
jurica238814 2:b28027b9c099 143 }
jurica238814 2:b28027b9c099 144 else if(state == 2){
jurica238814 2:b28027b9c099 145 NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr;
jurica238814 2:b28027b9c099 146 }
jurica238814 2:b28027b9c099 147 */
jurica238814 2:b28027b9c099 148
jurica238814 1:3e3dded8192f 149 led = 0;
jurica238814 1:3e3dded8192f 150 while(!NRF_I2S->EVENTS_TXPTRUPD); // Wait for the data to be send
jurica238814 1:3e3dded8192f 151 NRF_I2S->EVENTS_TXPTRUPD = 0;
jurica238814 1:3e3dded8192f 152 while(!NRF_I2S->EVENTS_TXPTRUPD); // Wait for the data to be send
jurica238814 2:b28027b9c099 153 NRF_I2S->EVENTS_TXPTRUPD = 0;
jurica238814 1:3e3dded8192f 154
jurica238814 2:b28027b9c099 155 NRF_I2S->TASKS_STOP = 1;
jurica238814 2:b28027b9c099 156 while(!NRF_I2S->EVENTS_STOPPED);
jurica238814 1:3e3dded8192f 157 NRF_I2S->ENABLE = 0;
jurica238814 0:d616ca59aad8 158 flag = 0;
jurica238814 1:3e3dded8192f 159 led = 1;
jurica238814 2:b28027b9c099 160 __enable_irq();
jurica238814 0:d616ca59aad8 161 }
jurica238814 2:b28027b9c099 162 }
jurica238814 0:d616ca59aad8 163 }
jurica238814 0:d616ca59aad8 164
jurica238814 0:d616ca59aad8 165