Arslan Test
Dependencies: AMS_ENS210_temp_humid_sensor
Diff: AMS_CCS811.cpp
- Revision:
- 15:cf658680c53f
- Parent:
- 14:0e8f5bf68b50
--- a/AMS_CCS811.cpp Thu May 04 13:08:54 2017 +0000 +++ b/AMS_CCS811.cpp Tue Mar 05 20:18:27 2019 +0100 @@ -1,17 +1,21 @@ #include "AMS_CCS811.h" +#include "AMS_CCS811_fw_2_0_0.h" +#include "mbed_trace.h" + +#define TRACE_GROUP "CCS" AMS_CCS811::AMS_CCS811(I2C * i2c, PinName n_wake_pin) : _n_wake_out(), _addr_out(), _int_data(), _ens210(), _i2c() { _n_wake_out = new (std::nothrow) DigitalOut(n_wake_pin, 1); - _i2c = i2c; + _i2c = i2c; } - + AMS_CCS811::AMS_CCS811(I2C * i2c, PinName n_wake_pin, I2C * ens210_i2c) : _n_wake_out(), _addr_out(), _int_data(), _ens210(), _i2c() { _n_wake_out = new (std::nothrow) DigitalOut(n_wake_pin, 1); _i2c = i2c; ens210_i2c_interface(ens210_i2c); } - + AMS_CCS811::~AMS_CCS811() { delete _n_wake_out; delete _addr_out; @@ -20,25 +24,54 @@ } bool AMS_CCS811::init() { - + bool success = false; - - + _init_errors(); _init_fractions(); set_defaults(); - + temp_reading = 0; humid_reading = 0; - + if (_n_wake_out) { - + char buffer[2]; + + if(i2c_read(HW_ID, buffer, 1) == 1) { + if(buffer[0] != 0x81) { + // not a CCS811 + tr_err("Not a CCS: %02x", buffer[0]); + return false; + } + } else { + return false; + } + + if(i2c_read(STATUS, buffer, 1) == 1) { + if((buffer[0] & 0x10) == 0) { + // does not have valid FW + flash_firmware(); + } + } else { + return false; + } + + if(i2c_read(FW_APP_VERSION, buffer, 2) == 2) { + tr_warn("CCS version %02x %02x", buffer[0], buffer[1]); + if (buffer[0] < CCS_FW_UPGRADE_VERSION) { + tr_warn("Flashing Firmware"); + flash_firmware(); + } + } else { + return false; + } + int fw_mode = firmware_mode(); - - if (fw_mode == 1) { + + if (fw_mode == 1) { success = write_config(); enable_ens210(true); - + } else if (fw_mode == 0) { // is in boot mode, needs to be loaded into app mode if (boot_app_start()) // if succesfully writes to app_start, retry init success = init(); @@ -48,33 +81,163 @@ return success; } +bool AMS_CCS811::flash_firmware() { + // kick into bootloader mode + int fw_mode = firmware_mode(); + if (fw_mode == 1) { + const char reset_sequence[] = {0x11, 0xE5, 0x72, 0x8A}; + if(i2c_write(0xFF, (char*)reset_sequence, 4) == 4) { + fw_mode = firmware_mode(); + if(fw_mode == 1) { + tr_err("Couldn't exit app mode"); + return false; + } + } else { + tr_err("Couldn't issue reset command"); + return false; + } + } + + // assert nwake + if (_n_wake_out != NULL) { + int write_count; + + _n_wake_out->write(0); + wait_ms(100); + + // erase current FW + static const char erase_sequence[4] = {0xE7, 0xA7, 0xE6, 0x09}; + write_count = 0; + _i2c->start(); + if(_i2c->write(CCS811_SLAVE_ADDR_W) == 1) { + if(_i2c->write(FW_ERASE) == 1) { + for (size_t i = 0; i < 4; i++) { + if(_i2c->write(erase_sequence[i]) == 1) write_count++; + else new_error(CCS811_LIB_I2CWRITE_ID); + } + } else new_error(CCS811_LIB_REG_ADDR_ID); + } else new_error(CCS811_LIB_SLAVE_W_ID); + _i2c->stop(); + + if (write_count != 4) { + _n_wake_out->write(1); + return false; + } + tr_info("CCS FW erased"); + wait_ms(500); + + // upload new FW + tr_info("uploading new FW"); + char payload[8]; + for(size_t offset = 0; offset < 5120; offset += 8) { + for(size_t j = 0; j < 8; j++) { + payload[j] = ams_fw_image[offset + j]; + } + + write_count = 0; + _i2c->start(); + if(_i2c->write(CCS811_SLAVE_ADDR_W) == 1) { + if(_i2c->write(FW_FLASH) == 1) { + for (size_t j = 0; j < 8; j++) { + if(_i2c->write(payload[j]) == 1) write_count++; + else new_error(CCS811_LIB_I2CWRITE_ID); + } + } else new_error(CCS811_LIB_REG_ADDR_ID); + } else new_error(CCS811_LIB_SLAVE_W_ID); + _i2c->stop(); + + wait_ms(50); + + if (write_count != 8) { + _n_wake_out->write(1); + tr_err("flash error"); + return false; + } + + tr_debug("Flashed byte %d of 5120", offset); + } + tr_info("CCS FW uploaded"); + + // verify new FW + write_count = 0; + _i2c->start(); + if(_i2c->write(CCS811_SLAVE_ADDR_W) == 1) { + if(_i2c->write(FW_VERIFY) == 1) { + write_count = 1; + } else new_error(CCS811_LIB_REG_ADDR_ID); + } else new_error(CCS811_LIB_SLAVE_W_ID); + _i2c->stop(); + + wait_ms(500); + + if (write_count != 1) { + _n_wake_out->write(1); + tr_err("Failed to issue verify"); + return false; + } + + char status = 0; + _i2c->start(); + if(_i2c->write(CCS811_SLAVE_ADDR_W) == 1) { + if(_i2c->write(STATUS) == 1) { + _i2c->start(); + if(_i2c->write(CCS811_SLAVE_ADDR_R) == 1) { + status = _i2c->read(0); + } else new_error(CCS811_LIB_SLAVE_R_ID); + } else new_error(CCS811_LIB_REG_ADDR_ID); + } else new_error(CCS811_LIB_SLAVE_W_ID); + _i2c->stop(); + + if (status == 0) { + tr_err("Failed update"); + _n_wake_out->write(1); + return false; + } + + if ((status & 0x30) != 0x30) { + tr_err("Failed verify"); + _n_wake_out->write(1); + return false; + } + + // boot into new FW + tr_info("upgraded"); + _n_wake_out->write(1); + wait_ms(50); + return boot_app_start(); + } else { + tr_err("No nWAKE available"); + return false; + } +} + void AMS_CCS811::i2c_interface(I2C * i2c) { _i2c = i2c; } - + bool AMS_CCS811::ens210_i2c_interface(I2C * i2c) { bool success; - + if (_ens210 == NULL) { _ens210 = new (std::nothrow) AMS_ENS210(i2c, true, true); if (_ens210 != NULL) { if (_ens210->init()) { success = _ens210->start(); } - } + } } else { _ens210->i2c_interface(i2c); success = true; } - + if (!success) new_error(CCS811_LIB_ENS210_INIT_ID); - + return success; } bool AMS_CCS811::enable_ens210(bool enable) { - + _ens210_enabled = false; if (_ens210 != NULL) { if (_ens210->i2c_interface() != NULL) _ens210_enabled = enable; @@ -87,7 +250,7 @@ enable_ens210(_ens210_enabled); // Make sure the state is representive return _ens210_enabled; } - + void AMS_CCS811::ens210_poll_interval(int poll_ms) { _ens210_poll_split = poll_ms; enable_ens210(_ens210_enabled); // makes sure the state is representive, and will also update the timer @@ -99,66 +262,66 @@ int AMS_CCS811::firmware_mode() { int firmware_result = -1; - + clear_errors(); - + read_byte_result read_result = read_status(); if (read_result.success) { firmware_result = (read_result.byte >> 7) & 1; } - + return firmware_result; } bool AMS_CCS811::mode(OP_MODES mode) { clear_errors(); - + OP_MODES old = _mode; // incase the write fails, to roll back _mode = mode; - + bool success = write_config(); if (!success) _mode = old; - + return success; } AMS_CCS811::OP_MODES AMS_CCS811::mode() { clear_errors(); - + OP_MODES result = INVALID; - + read_byte_result read_result = read_config(); if (read_result.success) { int mode = (read_result.byte >> 4) & 0b111; result = mode > 4 ? INVALID : (OP_MODES)mode; } - + return result; } -bool AMS_CCS811::addr_mode(bool high) { +bool AMS_CCS811::addr_mode(bool high) { _addr_dir = high; if (_addr_out != NULL) _addr_out->write(_addr_dir); - + update_slave_addr(); - + return addr_mode() == high; } bool AMS_CCS811::addr_mode() { _addr_dir = false; if (_addr_out != NULL) { - _addr_dir = _addr_out->read(); + _addr_dir = _addr_out->read(); } - + return _addr_dir; } bool AMS_CCS811::addr_pin(PinName pin) { _addr_out = _addr_out == NULL ? new (std::nothrow) DigitalOut(pin) : new (_addr_out) DigitalOut(pin); addr_mode(_addr_dir); - + return _addr_out != NULL; } @@ -171,14 +334,14 @@ char bytes[4]; if (humid > CCS811_MAX_HUMID) humid = CCS811_MAX_HUMID; if (humid < 0) humid = 0; - + temp += 25; if (temp > CCS811_MAX_TEMP) humid = CCS811_MAX_TEMP; if (temp < 0) temp = 0; - + float_to_short(humid, bytes); float_to_short(temp, bytes+2); - + return i2c_write(ENV_DATA, bytes, 4) == 4; } @@ -186,30 +349,30 @@ int AMS_CCS811::has_new_data() { clear_errors(); - + int result = -1; - + char meas_mode[1]; if(i2c_read(MEAS_MODE, meas_mode, 1) == 1) { // one read here is quicker than calling read_config() twice - + int curr_mode = (meas_mode[0] >> 4) & 0b111; if (curr_mode < 5) { if (curr_mode > 0) { // check for all valid modes other than idle if (((meas_mode[0] >> 3) & 1) == 0) { // check if interrupts are disabled - char status[1]; + char status[1]; if (i2c_read(STATUS, status, 1) == 1) // for some reason the status register in ALG_RESULT_DATA is not updated after reading data, however the STATUS register is result = (status[0] >> 3) & 1; - + } else result = 1; - - if (result == 1) + + if (result == 1) if (i2c_read(ALG_RESULT_DATA, _alg_result_data, 8) != 8) result = -1; - - + + } else result = 0; // return 0 when in idle } else new_error(CCS811_LIB_INV_MODE_ID); } - + return result; } @@ -235,20 +398,20 @@ bool AMS_CCS811::error_status() { bool result = false; - + read_byte_result read_result = read_status(); if (read_result.success) { result = read_result.byte & 1; } - + result = result || (_error_count > 0); - + return result; } - + AMS_CCS811::ccs811_errors AMS_CCS811::errors() { ccs811_errors error_result; - + char byte[1]; if (i2c_read(ERROR_ID, byte, 1) == 1) { for(int i = 0; i < CCS811_ERR_NUM; i++) { @@ -262,54 +425,54 @@ error_result.codes[error_result.count++] = i + CCS811_ERR_NUM; } } - + return error_result; - + } const char * AMS_CCS811::error_string(int err_code){ static char result[255]; result[0] = 0; - if (err_code < CCS811_TOTAL_ERR_NUM && err_code > -1) + if (err_code < CCS811_TOTAL_ERR_NUM && err_code > -1) strcpy(result, _error_strings[err_code]); - else + else sprintf(result, "Invalid Code: %d is out of range (0 - %d)", err_code, CCS811_TOTAL_ERR_NUM-1); - + return result; } bool AMS_CCS811::enable_interupt(bool enable) { bool old = _int_data_enabled; // incase the write fails, to roll back _int_data_enabled = enable; - + bool success = write_config(); if (!success) _int_data_enabled = old; - + return success; } int AMS_CCS811::interupt_enabled() { int enabled = -1; - + read_byte_result read_result = read_config(); if (read_result.success) { enabled = (read_result.byte >> 3) & 1; } - + return enabled; } bool AMS_CCS811::interrupt_pin(PinName pin) { bool success = false; - + _int_data = _int_data == NULL ? new (std::nothrow) InterruptIn(pin) : new (_int_data) InterruptIn(pin); if (_int_data != NULL) { _int_data->fall(callback(this, &AMS_CCS811::_isr_data)); success = true; } - + return success; } @@ -319,7 +482,7 @@ /** Private **/ void AMS_CCS811::set_defaults() { - if (_mode == NULL) + if (_mode == NULL) _mode = CONFIG_OP_MODE; if (_addr_dir == NULL) _addr_dir = CONFIG_ADDR_DIR; @@ -327,7 +490,7 @@ _int_data_enabled = CONFIG_INTR; if (_ens210_poll_split == NULL) _ens210_poll_split = CONFIG_ENS210_POLL; - + update_slave_addr(); } @@ -380,7 +543,7 @@ } void AMS_CCS811::_init_fractions() { - + fractions[0] = 0.5; fractions[1] = 0.25; fractions[2] = 0.125; @@ -390,7 +553,7 @@ fractions[6] = 0.0078125; fractions[7] = 0.00390625; fractions[8] = 0.001953125; - + } void AMS_CCS811::float_to_short(float in, char * output) { @@ -400,15 +563,15 @@ uint16_t _short = 0; for (int i = 0; i < 9; i++) { - if (dec_part == 0) break; + if (dec_part == 0) break; if (dec_part >= fractions[i]) { dec_part -= fractions[i]; _short |= 256 >> i; } } - + _short |= int_part << 9; - + output[0] = _short >> 8; output[1] = _short; } @@ -416,7 +579,7 @@ void AMS_CCS811::update_slave_addr() { _slave_addr = addr_mode() ? CCS811_SLAVE_ADDR_RAW_H : CCS811_SLAVE_ADDR_RAW_L; } - + void AMS_CCS811::_isr_data() { has_new_data(); // populate the data array _isr_data_fp.call(); @@ -444,26 +607,26 @@ result.success = true; result.byte = byte[0]; } - + return result; } bool AMS_CCS811::boot_app_start() { bool success = false; - + if (i2c_write(APP_START, NULL, 0) == 0) { wait_ms(70); success = true; } - + return success; } int AMS_CCS811::i2c_read(char reg_addr, char* output, int len) { int read_count = 0; - if (_n_wake_out != NULL) { // check nWAKE pin is set - _n_wake_out->write(0); // Hold low + if (_n_wake_out != NULL) { // check nWAKE pin is set + _n_wake_out->write(0); // Hold low wait_us(CCS811_T_AWAKE); // tAWAKE time to allow sensor I2C to wake up if (_i2c != NULL) { // check I2C interface is set _i2c->start(); // send start condition for write @@ -478,17 +641,17 @@ } else new_error(CCS811_LIB_SLAVE_R_ID); } else new_error(CCS811_LIB_REG_ADDR_ID); } else new_error(CCS811_LIB_SLAVE_W_ID); - _i2c->stop(); // send stop condition + _i2c->stop(); // send stop condition } else new_error(CCS811_LIB_I2C_ID); _n_wake_out->write(1); // Set back to high wait_us(CCS811_T_DWAKE); // tDWAKE time to allow sensor I2C to sleep } else new_error(CCS811_LIB_N_WAKE_ID); - + return read_count; } int AMS_CCS811::i2c_write(char reg_addr, char* input, int len) { - + int write_count = -1; if (_n_wake_out != NULL) { // check nWAKE pin is set _n_wake_out->write(0); // Hold low @@ -504,11 +667,11 @@ } } else new_error(CCS811_LIB_REG_ADDR_ID); } else new_error(CCS811_LIB_SLAVE_W_ID); - _i2c->stop(); // send stop condition + _i2c->stop(); // send stop condition } else new_error(CCS811_LIB_I2C_ID); _n_wake_out->write(1); // set back to high wait_us(CCS811_T_DWAKE); // tDWAKE time to allow sensor I2C to sleep }else new_error(CCS811_LIB_N_WAKE_ID); - + return write_count; } \ No newline at end of file