Sony's LANC camera control protocol project.
Dependencies: aconno_LANC aconno_bsp aconno_SEGGER_RTT
main.cpp@4:6560e2966186, 2017-11-01 (annotated)
- Committer:
- jurica238814
- Date:
- Wed Nov 01 12:52:30 2017 +0000
- Revision:
- 4:6560e2966186
- Parent:
- 3:eb5b87baf6cf
- Child:
- 5:ecb7712b0825
Start/Stop rec, wide, tele works =)
Who changed what in which revision?
User | Revision | Line number | New 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 | 2:b28027b9c099 | 24 | #define LANC_COMMAND_PIN (p2) // Pin connected to Tr to pull lanc bus down/up 2/26 |
jurica238814 | 2:b28027b9c099 | 25 | #define LANC_PIN (p3) // Lanc bus pin (to scan for START/STOP bits) 3/25 |
jurica238814 | 0:d616ca59aad8 | 26 | |
jurica238814 | 2:b28027b9c099 | 27 | DigitalOut alive(p24); |
jurica238814 | 2:b28027b9c099 | 28 | |
jurica238814 | 2:b28027b9c099 | 29 | 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 | 4:6560e2966186 | 30 | uint8_t specialCommand[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_L,LANC_L,LANC_L,LANC_H, LANC_L,LANC_H,LANC_L,LANC_L}; |
jurica238814 | 2:b28027b9c099 | 31 | 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 | 4:6560e2966186 | 32 | uint8_t zoomIn[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_H,LANC_L,LANC_L,LANC_H,LANC_H,LANC_H,LANC_L,LANC_L}; // Tele |
jurica238814 | 4:6560e2966186 | 33 | uint8_t zoomOut[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_H,LANC_H,LANC_L,LANC_H,LANC_H,LANC_H,LANC_L,LANC_L}; // Wide |
jurica238814 | 1:3e3dded8192f | 34 | |
jurica238814 | 4:6560e2966186 | 35 | uint32_t *normalCmdAddr = (uint32_t*)specialCommand; |
jurica238814 | 4:6560e2966186 | 36 | uint32_t *startStopAddr = (uint32_t*)zoomOut; |
jurica238814 | 2:b28027b9c099 | 37 | |
jurica238814 | 2:b28027b9c099 | 38 | uint8_t firstInt = 1; |
jurica238814 | 2:b28027b9c099 | 39 | uint8_t flag = 0; |
jurica238814 | 4:6560e2966186 | 40 | uint8_t state = 0; /* 1 -> Send command type, 0 -> send command */ |
jurica238814 | 1:3e3dded8192f | 41 | InterruptIn button(LANC_PIN); |
jurica238814 | 2:b28027b9c099 | 42 | Timer frameTimer; |
jurica238814 | 1:3e3dded8192f | 43 | |
jurica238814 | 0:d616ca59aad8 | 44 | |
jurica238814 | 2:b28027b9c099 | 45 | void sendCommand(void){ |
jurica238814 | 3:eb5b87baf6cf | 46 | static int lastIntTime_us = 0; |
jurica238814 | 1:3e3dded8192f | 47 | |
jurica238814 | 2:b28027b9c099 | 48 | /* |
jurica238814 | 2:b28027b9c099 | 49 | * Na prvi interrupt pokreni frameTimer. |
jurica238814 | 2:b28027b9c099 | 50 | * Na svaki interrupt (falling edge na Lanc busu) izmjeri vrijeme od zadnjeg eventa |
jurica238814 | 2:b28027b9c099 | 51 | * Ako je to vrijeme > 5ms, onda je upravo taj prekid izazvao start bit novog framea |
jurica238814 | 2:b28027b9c099 | 52 | * U tom slučaju, kreni s donjim kodom, inaće nemoj ništa slati |
jurica238814 | 2:b28027b9c099 | 53 | */ |
jurica238814 | 2:b28027b9c099 | 54 | if(firstInt){ |
jurica238814 | 2:b28027b9c099 | 55 | firstInt = 0; |
jurica238814 | 2:b28027b9c099 | 56 | frameTimer.start(); |
jurica238814 | 2:b28027b9c099 | 57 | } |
jurica238814 | 2:b28027b9c099 | 58 | |
jurica238814 | 3:eb5b87baf6cf | 59 | lastIntTime_us = frameTimer.read_us(); |
jurica238814 | 2:b28027b9c099 | 60 | frameTimer.reset(); |
jurica238814 | 1:3e3dded8192f | 61 | |
jurica238814 | 3:eb5b87baf6cf | 62 | if(lastIntTime_us > 10000 || state == 1){ |
jurica238814 | 2:b28027b9c099 | 63 | state++; |
jurica238814 | 2:b28027b9c099 | 64 | |
jurica238814 | 2:b28027b9c099 | 65 | if(state == 1){ |
jurica238814 | 2:b28027b9c099 | 66 | NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr; |
jurica238814 | 2:b28027b9c099 | 67 | } |
jurica238814 | 2:b28027b9c099 | 68 | else if(state == 2){ |
jurica238814 | 2:b28027b9c099 | 69 | NRF_I2S->TXD.PTR = (uint32_t)startStopAddr; |
jurica238814 | 3:eb5b87baf6cf | 70 | state = 0; |
jurica238814 | 2:b28027b9c099 | 71 | } |
jurica238814 | 2:b28027b9c099 | 72 | |
jurica238814 | 2:b28027b9c099 | 73 | if(state<=2){ |
jurica238814 | 2:b28027b9c099 | 74 | __disable_irq(); |
jurica238814 | 2:b28027b9c099 | 75 | // First or second start bit |
jurica238814 | 2:b28027b9c099 | 76 | wait_us(60); // Small delay for first bit after start bit |
jurica238814 | 2:b28027b9c099 | 77 | NRF_I2S->EVENTS_TXPTRUPD = 0; |
jurica238814 | 2:b28027b9c099 | 78 | NRF_I2S->ENABLE = 1; |
jurica238814 | 2:b28027b9c099 | 79 | NRF_I2S->TASKS_START = 1; |
jurica238814 | 2:b28027b9c099 | 80 | flag = 1; |
jurica238814 | 2:b28027b9c099 | 81 | } |
jurica238814 | 2:b28027b9c099 | 82 | } |
jurica238814 | 1:3e3dded8192f | 83 | } |
jurica238814 | 1:3e3dded8192f | 84 | |
jurica238814 | 1:3e3dded8192f | 85 | |
jurica238814 | 1:3e3dded8192f | 86 | |
jurica238814 | 0:d616ca59aad8 | 87 | int main(void){ |
jurica238814 | 2:b28027b9c099 | 88 | alive = 0; |
jurica238814 | 1:3e3dded8192f | 89 | |
jurica238814 | 0:d616ca59aad8 | 90 | NRF_I2S->CONFIG.RXEN = 0; // Disable reception |
jurica238814 | 0:d616ca59aad8 | 91 | NRF_I2S->CONFIG.MCKEN = 1; // Enable MCK generator |
jurica238814 | 4:6560e2966186 | 92 | |
jurica238814 | 1:3e3dded8192f | 93 | NRF_I2S->CONFIG.MCKFREQ = 0x10000000; // DIV 31 |
jurica238814 | 1:3e3dded8192f | 94 | NRF_I2S->CONFIG.RATIO = 0; // Ratio = 32x |
jurica238814 | 0:d616ca59aad8 | 95 | |
jurica238814 | 1:3e3dded8192f | 96 | NRF_I2S->CONFIG.SWIDTH = 0; // Sample width = 8 bit |
jurica238814 | 1:3e3dded8192f | 97 | NRF_I2S->CONFIG.ALIGN = 0; // Alignment = Right |
jurica238814 | 0:d616ca59aad8 | 98 | NRF_I2S->CONFIG.FORMAT = 0; // Format = I2S |
jurica238814 | 0:d616ca59aad8 | 99 | NRF_I2S->CONFIG.CHANNELS = 0; // Use stereo |
jurica238814 | 0:d616ca59aad8 | 100 | |
jurica238814 | 1:3e3dded8192f | 101 | NRF_I2S->PSEL.LRCK = 27; // LRCK routed to pin 26 |
jurica238814 | 1:3e3dded8192f | 102 | NRF_I2S->PSEL.SDOUT = LANC_COMMAND_PIN; // SDOUT routed to pin 28 |
jurica238814 | 1:3e3dded8192f | 103 | NRF_I2S->PSEL.SCK = 30; // SCK routed to pin 30 |
jurica238814 | 1:3e3dded8192f | 104 | NRF_I2S->PSEL.MCK = 0x80000000; // MCK disconnected |
jurica238814 | 1:3e3dded8192f | 105 | NRF_I2S->PSEL.SDIN = 0x80000000; // SDIN disconnected |
jurica238814 | 0:d616ca59aad8 | 106 | |
jurica238814 | 2:b28027b9c099 | 107 | NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr; |
jurica238814 | 2:b28027b9c099 | 108 | NRF_I2S->RXTXD.MAXCNT = MY_BUF_SIZE/4; // Div with 4 cuz that's number of 32 bit words |
jurica238814 | 2:b28027b9c099 | 109 | |
jurica238814 | 1:3e3dded8192f | 110 | button.fall(sendCommand); |
jurica238814 | 0:d616ca59aad8 | 111 | while(1){ |
jurica238814 | 4:6560e2966186 | 112 | if(flag){ |
jurica238814 | 1:3e3dded8192f | 113 | while(!NRF_I2S->EVENTS_TXPTRUPD); // Wait for the data to be send |
jurica238814 | 1:3e3dded8192f | 114 | NRF_I2S->EVENTS_TXPTRUPD = 0; |
jurica238814 | 1:3e3dded8192f | 115 | while(!NRF_I2S->EVENTS_TXPTRUPD); // Wait for the data to be send |
jurica238814 | 2:b28027b9c099 | 116 | NRF_I2S->EVENTS_TXPTRUPD = 0; |
jurica238814 | 1:3e3dded8192f | 117 | |
jurica238814 | 2:b28027b9c099 | 118 | NRF_I2S->TASKS_STOP = 1; |
jurica238814 | 2:b28027b9c099 | 119 | while(!NRF_I2S->EVENTS_STOPPED); |
jurica238814 | 1:3e3dded8192f | 120 | NRF_I2S->ENABLE = 0; |
jurica238814 | 0:d616ca59aad8 | 121 | flag = 0; |
jurica238814 | 2:b28027b9c099 | 122 | __enable_irq(); |
jurica238814 | 0:d616ca59aad8 | 123 | } |
jurica238814 | 2:b28027b9c099 | 124 | } |
jurica238814 | 0:d616ca59aad8 | 125 | } |
jurica238814 | 0:d616ca59aad8 | 126 | |
jurica238814 | 0:d616ca59aad8 | 127 |