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Revision 0:7a6a7374b6d7, committed 2017-01-09
- Comitter:
- gigabite
- Date:
- Mon Jan 09 15:55:05 2017 +0000
- Child:
- 1:b6f857ea3ce2
- Commit message:
- Event based implementation
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/adns9800.cpp Mon Jan 09 15:55:05 2017 +0000 @@ -0,0 +1,150 @@ +#include "mbed.h" +#include "adns9800.h" +#include "firmware.h" + +ADNS9800::ADNS9800(PinName MOSI, PinName MISO, PinName SCK, PinName NCS):mySPI(MOSI, MISO, SCK), ncs(NCS) +{ + // initialize + initComplete = 0; + mySPI.format(8, 3); + mySPI.frequency(1000000); +} + +void ADNS9800::initialize() +{ + comm_end(); + comm_begin(); + comm_end(); + + write_reg(REG_Power_Up_Reset, 0x5a); // force reset + wait_ms(50); + + // read registers and discard data + read_reg(REG_Motion); + read_reg(REG_Delta_X_L); + read_reg(REG_Delta_X_H); + read_reg(REG_Delta_Y_L); + read_reg(REG_Delta_Y_H); + + // upload firmware + printf("Uploading firmware... \r\n"); + upload_firmware(); + wait_ms(10); + printf("Done... \r\n"); + + // enable laser(bit 0 = 0b), in normal mode (bits 3,2,1 = 000b) + // reading the actual value of the register is important because the real + // default value is different from what is said in the datasheet, and if you + // change the reserved bytes (like by writing 0x00...) it would not work. + uint8_t laser_ctrl0 = read_reg(REG_LASER_CTRL0); + write_reg(REG_LASER_CTRL0, laser_ctrl0 & 0xf0); + + wait_ms(1); + + // initialized! + initComplete = 1; +} + + +void ADNS9800::comm_begin() +{ + ncs = 0; +} + +void ADNS9800::comm_end() +{ + ncs = 1; +} + +void ADNS9800::reset_movePin() +{ + // writes movement register to reset pin + write_reg(REG_Motion, 1); +} + +uint8_t ADNS9800::read_reg(uint8_t reg_addr) +{ + uint8_t val; + comm_begin(); + mySPI.write(reg_addr); // send register address to read + wait_us(100); + val = mySPI.write(0x00); // read value + comm_end(); + return val; +} + +void ADNS9800::write_reg(uint8_t reg_addr, uint8_t val) +{ + comm_begin(); + mySPI.write(reg_addr | 0x80); + mySPI.write(val); + wait_us(20); + comm_end(); + wait_us(100); +} + +void ADNS9800::upload_firmware() +{ + write_reg(REG_Configuration_IV, 0x02); + write_reg(REG_SROM_Enable, 0x1d); + wait_ms(10); + + write_reg(REG_SROM_Enable, 0x18); + comm_begin(); + + mySPI.write(REG_SROM_Load_Burst | 0x80); + wait_us(15); + + uint8_t c; + for (int i=0; i<FIRMWARE_LENGTH; i++) { + c = firmware_data[i]; + mySPI.write(c); + wait_us(15); + } + comm_end(); +} + +void ADNS9800::getMovement(uint8_t *mot, int* x, int* y) +{ + uint8_t dx_lo, dx_hi, dy_lo, dy_hi; + + if(initComplete == 1) + { + comm_begin(); + *mot = read_reg(REG_Motion); + dx_lo = read_reg(REG_Delta_X_L); + dx_hi = read_reg(REG_Delta_X_H); + dy_lo = read_reg(REG_Delta_Y_L); + dy_hi = read_reg(REG_Delta_Y_H); + comm_end(); + + *x = (dx_hi << 8 | dx_lo); + *y = (dy_hi << 8 | dy_lo); + } +} + +void ADNS9800::read_burst(int* movement, int* observe, int* delta_x, int* delta_y) +{ + uint8_t dx_lo, dx_hi, dy_lo, dy_hi; + + // reads multiple registers in a burst + comm_begin(); + mySPI.write(REG_Motion_Burst); + wait_us(500); + + // first reg is movement, followed by obervation, dx_lo, dx_hi, dy_lo, dy_hi, + // squal, pixel_sum, max_px, min_px, shutter_upper, shutter_lower, frame_period_upper, frame_period_lower + // we only read the first 6 bytes + + *movement = mySPI.write(0); + *observe = mySPI.write(0); + dx_lo = mySPI.write(0); + dx_hi = mySPI.write(0); + dy_lo = mySPI.write(0); + dy_hi = mySPI.write(0); + + comm_end(); + + *delta_x = (dx_hi << 8 | dx_lo); + *delta_y = (dy_hi << 8 | dy_lo); +} \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/adns9800.h Mon Jan 09 15:55:05 2017 +0000 @@ -0,0 +1,79 @@ +#ifndef ADNS9800_H +#define ADNS9800_H + +#include "mbed.h" + +// Registers +#define REG_Product_ID 0x00 +#define REG_Revision_ID 0x01 +#define REG_Motion 0x02 +#define REG_Delta_X_L 0x03 +#define REG_Delta_X_H 0x04 +#define REG_Delta_Y_L 0x05 +#define REG_Delta_Y_H 0x06 +#define REG_SQUAL 0x07 +#define REG_Pixel_Sum 0x08 +#define REG_Maximum_Pixel 0x09 +#define REG_Minimum_Pixel 0x0a +#define REG_Shutter_Lower 0x0b +#define REG_Shutter_Upper 0x0c +#define REG_Frame_Period_Lower 0x0d +#define REG_Frame_Period_Upper 0x0e +#define REG_Configuration_I 0x0f +#define REG_Configuration_II 0x10 +#define REG_Frame_Capture 0x12 +#define REG_SROM_Enable 0x13 +#define REG_Run_Downshift 0x14 +#define REG_Rest1_Rate 0x15 +#define REG_Rest1_Downshift 0x16 +#define REG_Rest2_Rate 0x17 +#define REG_Rest2_Downshift 0x18 +#define REG_Rest3_Rate 0x19 +#define REG_Frame_Period_Max_Bound_Lower 0x1a +#define REG_Frame_Period_Max_Bound_Upper 0x1b +#define REG_Frame_Period_Min_Bound_Lower 0x1c +#define REG_Frame_Period_Min_Bound_Upper 0x1d +#define REG_Shutter_Max_Bound_Lower 0x1e +#define REG_Shutter_Max_Bound_Upper 0x1f +#define REG_LASER_CTRL0 0x20 +#define REG_Observation 0x24 +#define REG_Data_Out_Lower 0x25 +#define REG_Data_Out_Upper 0x26 +#define REG_SROM_ID 0x2a +#define REG_Lift_Detection_Thr 0x2e +#define REG_Configuration_V 0x2f +#define REG_Configuration_IV 0x39 +#define REG_Power_Up_Reset 0x3a +#define REG_Shutdown 0x3b +#define REG_Inverse_Product_ID 0x3f +#define REG_Motion_Burst 0x50 +#define REG_SROM_Load_Burst 0x62 +#define REG_Pixel_Burst 0x64 + + +class ADNS9800 +{ +public: + // constructor + ADNS9800(PinName MOSI, PinName MISO, PinName SCK, PinName NCS); + void initialize(); + void read_burst(int *movement, int *observe, int *delta_x, int *delta_y); + void getMovement(uint8_t *mot, int *delta_x, int *delta_y); + uint8_t read_reg(uint8_t); + void write_reg(uint8_t, uint8_t); + void comm_begin(); + void comm_end(); + void reset_movePin(); + +private: + int initComplete; + SPI mySPI; + DigitalOut ncs; + + void upload_firmware(); +}; + + + + +#endif \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/firmware.h Mon Jan 09 15:55:05 2017 +0000 @@ -0,0 +1,3083 @@ +#ifndef FIRMWARE_H +#define FIRMWARE_H + +#include "mbed.h" +#define FIRMWARE_LENGTH 3070 + +// Firmware "adns9800_srom_A4.txt" from +// This firmware is Copyright Avago, please refer to them concerning modifications. + +const unsigned char firmware_data[] = { +0x03, +0xa6, +0x68, +0x1e, +0x7d, +0x10, +0x7e, +0x7e, +0x5f, +0x1c, +0xb8, +0xf2, +0x47, +0x0c, +0x7b, +0x74, +0x4b, +0x14, +0x8b, +0x75, +0x66, +0x51, +0x0b, +0x8c, +0x76, +0x74, +0x4b, +0x14, +0xaa, +0xd6, +0x0f, +0x9c, +0xba, +0xf6, +0x6e, +0x3f, +0xdd, +0x38, +0xd5, +0x02, +0x80, +0x9b, +0x82, +0x6d, +0x58, +0x13, +0xa4, +0xab, +0xb5, +0xc9, +0x10, +0xa2, +0xc6, +0x0a, +0x7f, +0x5d, +0x19, +0x91, +0xa0, +0xa3, +0xce, +0xeb, +0x3e, +0xc9, +0xf1, +0x60, +0x42, +0xe7, +0x4c, +0xfb, +0x74, +0x6a, +0x56, +0x2e, +0xbf, +0xdd, +0x38, +0xd3, +0x05, +0x88, +0x92, +0xa6, +0xce, +0xff, +0x5d, +0x38, +0xd1, +0xcf, +0xef, 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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Jan 09 15:55:05 2017 +0000 @@ -0,0 +1,133 @@ +#include "mbed.h" +#include "adns9800.h" + +InterruptIn pulse(p8); // connects to FPGA and listens for start recording pulse +DigitalOut gndPin(p7); +DigitalOut ledPin(LED1); +ADNS9800 adns(p11,p12,p13,p10); +Serial pc(USBTX, USBRX); +int dx, dy, movementFlag, recFlag; +Ticker tmr; +uint32_t time_start, time_now, time_elapsed; + +void displayRegisters() +{ + int oreg[4] = {0x00,0x3F,0x2A,0x02}; + char* oregname[] = {"Product_ID:","Inverse_Product_ID:","SROM_Version:","Motion:"}; + uint8_t regres; + + int rctr; + + for(rctr=0; rctr<4; rctr++){ + pc.printf("---\r\n"); + regres = adns.read_reg(oreg[rctr]); + pc.printf(oregname[rctr]); + pc.printf("%02x\r\n", regres); + wait_ms(1); + } +} + +void read_motion() +{ + int motion, obs; + adns.read_burst(&motion, &obs, &dx, &dy); + if(recFlag == 1 && (dx > 0 || dy > 0)) + { + time_now = us_ticker_read(); + time_elapsed = time_now - time_start; + time_start = time_now; + + movementFlag = 1; + } +} + +void start_rec() +{ + recFlag = 1; + ledPin = 1; + time_start = us_ticker_read(); +} + +void stop_rec() +{ + ledPin = 0; + recFlag = 0; +} + +void format_and_send() +{ + // follow LSA's packet format + /* + * Data format from microblaze to PC: + * 1PZZZMTT_0TTTTTTT_0TTTTTTT_00XXXXXX_00YYYYYY + * Where T = timestamp, P = polarity, X = xcoord, Y = ycoord, Z = type of spike, M = mouse pkt bit + * Only first byte has MSB set + * M bit will be used to indicate this is a mouse sensor data + * timestamp in 100us per increment + * dx = 0(PX)XXXXXX where 2nd bit is polarity + */ + + uint8_t outPkt[5]; + time_elapsed = time_elapsed / 100; + + outPkt[0] = 0x84 | ((time_elapsed >> 14) & 0x00000003); + outPkt[1] = ((time_elapsed >> 7) & 0x0000007F); + outPkt[2] = (time_elapsed & 0x0000007F); + + if(dx & 0x8000) + { + dx = (dx^0xFFFF) + 1; + outPkt[3] = 0x40 | (dx & 0x3F); // negative + } + else + { + outPkt[3] = dx & 0x3F; + } + + if(dy & 0x8000) + { + dy = (dy^0xFFFF) + 1; + outPkt[4] = 0x40 | (dy & 0x3F); + } + else + { + outPkt[4] = dy & 0x3F; + } + + // send packet + for (int i=0; i<5; i++) + { + pc.putc(outPkt[i]); + } +} + +int main() { + gndPin = 0; // lazy to connect to true ground pin + movementFlag = 0; + recFlag = 0; + + pc.baud(115200); + pc.printf("ADNS9800 test\r\n"); + + adns.initialize(); + + // display registers + displayRegisters(); + + pc.printf("Sensor initialized\r\n"); + + // for sync with FPGA + pulse.rise(&start_rec); + pulse.fall(&stop_rec); + + tmr.attach_us(&read_motion, 1000); // timer interrupt to read registers + + while(1) { + + if(movementFlag == 1) + { + format_and_send(); + movementFlag = 0; + } + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Jan 09 15:55:05 2017 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/2241e3a39974 \ No newline at end of file