#include <array>
+constexpr unsigned int MAX_ELF_FILE_SIZE = 12 * 1024;
+constexpr unsigned int MAX_ERROR_QUEUE_SIZE = 8;
constexpr unsigned int MAX_SAMPLE_BUFFER_SIZE = 8000;
enum class RunStatus : char
{
Idle = '1',
- Converting,
- Recovered
+ Running
};
+enum class Error : char
+{
+ None = 0,
+ BadParam,
+ BadParamSize,
+ BadUserCodeLoad,
+ BadUserCodeSize,
+ NotIdle,
+ ConversionAborted
+};
+
static RunStatus run_status = RunStatus::Idle;
+static Error error_queue[MAX_ERROR_QUEUE_SIZE];
+static unsigned int error_queue_index = 0;
+
+static void error_queue_add(Error error)
+{
+ if (error_queue_index < MAX_ERROR_QUEUE_SIZE)
+ error_queue[error_queue_index++] = error;
+}
+static Error error_queue_pop()
+{
+ return error_queue_index == 0 ? Error::None : error_queue[--error_queue_index];
+}
#define MSG_CONVFIRST (1)
#define MSG_CONVSECOND (2)
#define MSG_CONVFIRST_MEASURE (3)
#define MSG_CONVSECOND_MEASURE (4)
-static msg_t conversionMBBuffer[8];
-static MAILBOX_DECL(conversionMB, conversionMBBuffer, 8);
+static msg_t conversionMBBuffer[4];
+static MAILBOX_DECL(conversionMB, conversionMBBuffer, 4);
static THD_WORKING_AREA(conversionThreadWA, 1024);
static THD_FUNCTION(conversionThread, arg);
#endif
static std::array<dacsample_t, CACHE_SIZE_ALIGN(dacsample_t, MAX_SAMPLE_BUFFER_SIZE)> dac_samples;
-static uint8_t elf_file_store[12288];
+static uint8_t elf_file_store[MAX_ELF_FILE_SIZE];
static elf::entry_t elf_entry = nullptr;
static void signal_operate(adcsample_t *buffer, size_t count);
main_loop();
}
+static unsigned int dac_sample_count = MAX_SAMPLE_BUFFER_SIZE;
+static unsigned int adc_sample_count = MAX_SAMPLE_BUFFER_SIZE;
+static bool adc_preloaded = false;
+static bool dac_preloaded = false;
+
void main_loop()
{
- static unsigned int dac_sample_count = MAX_SAMPLE_BUFFER_SIZE;
while (1) {
if (usbserial::is_active()) {
// Packet received, first byte represents the desired command/action
switch (cmd[0]) {
- // 'r' - Conduct a single sample of the ADC, and send the results back over USB.
- case 'r':
- // Get the next two bytes of the packet to determine the desired sample size
- if (run_status != RunStatus::Idle || usbserial::read(&cmd[1], 2) < 2)
- break;
- if (unsigned int desiredSize = cmd[1] | (cmd[2] << 8); desiredSize <= adc_samples.size()) {
- adc::read(&adc_samples[0], desiredSize);
- usbserial::write(adc_samples.data(), desiredSize * sizeof(adcsample_t));
- }
+ case 'a':
+ usbserial::write(adc_samples.data(), adc_sample_count * sizeof(adcsample_t));
+ break;
+ case 'A':
+ usbserial::read(&adc_samples[0], adc_sample_count * sizeof(adcsample_t));
break;
- // 'R' - Begin continuous sampling/conversion of the ADC. Samples will go through
- // the conversion code, and will be sent out over the DAC.
- case 'R':
- //if (run_status != RunStatus::Idle)
- // break;
-
- run_status = RunStatus::Converting;
- dac_samples.fill(0);
- adc::read_start(signal_operate, &adc_samples[0], adc_samples.size());
- dac::write_start(&dac_samples[0], dac_samples.size());
+ case 'B':
+ if (run_status == RunStatus::Idle) {
+ if (usbserial::read(&cmd[1], 2) == 2) {
+ unsigned int count = cmd[1] | (cmd[2] << 8);
+ if (count <= MAX_SAMPLE_BUFFER_SIZE / 2) {
+ adc_sample_count = count * 2;
+ dac_sample_count = count * 2;
+ } else {
+ error_queue_add(Error::BadParam);
+ }
+ } else {
+ error_queue_add(Error::BadParamSize);
+ }
+ } else {
+ error_queue_add(Error::NotIdle);
+ }
break;
- // 'M' - Begins continuous sampling, but measures the execution time of the first
- // sample processing. This duration can be later read through 'm'.
- case 'M':
- run_status = RunStatus::Converting;
- dac_samples.fill(0);
- adc::read_start(signal_operate_measure, &adc_samples[0], adc_samples.size());
- dac::write_start(&dac_samples[0], dac_samples.size());
+ case 'd':
+ usbserial::write(dac_samples.data(), dac_sample_count * sizeof(dacsample_t));
+ break;
+ case 'D':
+ usbserial::read(&dac_samples[0], dac_sample_count * sizeof(dacsample_t));
break;
- // 'm' - Returns the last measured sample processing time, presumably in processor
- // ticks.
- case 'm':
- usbserial::write(&conversion_time_measurement.last, sizeof(rtcnt_t));
+ // 'E' - Reads in and loads the compiled conversion code binary from USB.
+ case 'E':
+ if (run_status == RunStatus::Idle) {
+ if (usbserial::read(&cmd[1], 2) == 2) {
+ // Only load the binary if it can fit in the memory reserved for it.
+ unsigned int size = cmd[1] | (cmd[2] << 8);
+ if (size < sizeof(elf_file_store)) {
+ usbserial::read(elf_file_store, size);
+ elf_entry = elf::load(elf_file_store);
+
+ if (elf_entry == nullptr)
+ error_queue_add(Error::BadUserCodeLoad);
+ } else {
+ error_queue_add(Error::BadUserCodeSize);
+ }
+ } else {
+ error_queue_add(Error::BadParamSize);
+ }
+ } else {
+ error_queue_add(Error::NotIdle);
+ }
break;
- // 's' - Sends the current contents of the DAC buffer back over USB.
- case 's':
- usbserial::write(dac_samples.data(), 1/*dac_samples.size()*/ * sizeof(dacsample_t));
+ // 'e' - Unloads the currently loaded conversion code
+ case 'e':
+ elf_entry = nullptr;
break;
- // 'S' - Stops the continuous sampling/conversion.
- case 'S':
- //if (run_status != RunStatus::Converting)
- // break;
+ // 'i' - Sends an identifying string to confirm that this is the stmdsp device.
+ case 'i':
+ usbserial::write("stmdsp", 6);
+ break;
- dac::write_stop();
- adc::read_stop();
- run_status = RunStatus::Idle;
+ // 'I' - Sends the current run status.
+ case 'I':
+ {
+ char buf[2] = {
+ static_cast<char>(run_status),
+ static_cast<char>(error_queue_pop())
+ };
+ usbserial::write(buf, sizeof(buf));
+ }
break;
- // 'e' - Reads in and loads the compiled conversion code binary from USB.
- case 'e':
- // Get the binary's size
- if (usbserial::read(&cmd[1], 2) < 2)
- break;
-
- // Only load the binary if it can fit in the memory reserved for it.
- if (unsigned int binarySize = cmd[1] | (cmd[2] << 8); binarySize < sizeof(elf_file_store)) {
- usbserial::read(elf_file_store, binarySize);
- elf_entry = elf::load(elf_file_store);
+ // 'M' - Begins continuous sampling, but measures the execution time of the first
+ // sample processing. This duration can be later read through 'm'.
+ case 'M':
+ if (run_status == RunStatus::Idle) {
+ run_status = RunStatus::Running;
+ dac_samples.fill(0);
+ if (!adc_preloaded)
+ adc::read_start(signal_operate_measure, &adc_samples[0], adc_sample_count);
+ if (!dac_preloaded)
+ dac::write_start(&dac_samples[0], dac_sample_count);
} else {
- elf_entry = nullptr;
+ error_queue_add(Error::NotIdle);
}
break;
- // 'E' - Unloads the currently loaded conversion code
- case 'E':
- elf_entry = nullptr;
+ // 'm' - Returns the last measured sample processing time, presumably in processor
+ // ticks.
+ case 'm':
+ usbserial::write(&conversion_time_measurement.last, sizeof(rtcnt_t));
break;
- // 'W' - Sets the number of samples for DAC writing with command 'w'.
- // If the provided count is zero, DAC writing is stopped.
- case 'W':
- if (usbserial::read(&cmd[1], 2) < 2)
- break;
- if (unsigned int sampleCount = cmd[1] | (cmd[2] << 8); sampleCount <= dac_samples.size()) {
- if (sampleCount > 0)
- dac_sample_count = sampleCount;
- else
- dac::write_stop();
+ // 'R' - Begin continuous sampling/conversion of the ADC. Samples will go through
+ // the conversion code, and will be sent out over the DAC.
+ case 'R':
+ if (run_status == RunStatus::Idle) {
+ run_status = RunStatus::Running;
+ dac_samples.fill(0);
+ if (!adc_preloaded)
+ adc::read_start(signal_operate, &adc_samples[0], adc_sample_count);
+ if (!dac_preloaded)
+ dac::write_start(&dac_samples[0], dac_sample_count);
+ } else {
+ error_queue_add(Error::NotIdle);
}
break;
- // 'w' - Starts the DAC, looping over the given data (data size set by command 'W').
- case 'w':
- if (usbserial::read(&dac_samples[0], dac_sample_count * sizeof(dacsample_t) !=
- dac_sample_count * sizeof(dacsample_t)))
- {
- break;
+ case 'r':
+ if (usbserial::read(&cmd[1], 1) == 1) {
+ adc_preloaded = cmd[1] & (1 << 0);
+ dac_preloaded = cmd[1] & (1 << 1);
} else {
- dac::write_start(&dac_samples[0], dac_sample_count);
+ error_queue_add(Error::BadParamSize);
}
break;
- // 'i' - Sends an identifying string to confirm that this is the stmdsp device.
- case 'i':
- usbserial::write("stmdsp", 6);
- break;
-
- // 'I' - Sends the current run status.
- case 'I':
- usbserial::write(&run_status, sizeof(run_status));
+ // 'S' - Stops the continuous sampling/conversion.
+ case 'S':
+ if (run_status == RunStatus::Running) {
+ if (!dac_preloaded)
+ dac::write_stop();
+ if (!adc_preloaded)
+ adc::read_stop();
+ run_status = RunStatus::Idle;
+ }
break;
default:
void conversion_abort()
{
elf_entry = nullptr;
- dac::write_stop();
- adc::read_stop();
- run_status = RunStatus::Recovered;
+ if (!dac_preloaded)
+ dac::write_stop();
+ if (!adc_preloaded)
+ adc::read_stop();
+ error_queue_add(Error::ConversionAborted);
}
THD_FUNCTION(conversionThread, arg)
msg_t message;
if (chMBFetchTimeout(&conversionMB, &message, TIME_INFINITE) == MSG_OK) {
adcsample_t *samples = nullptr;
- auto halfsize = adc_samples.size() / 2;
+ auto halfsize = adc_sample_count / 2;
if (message == MSG_CONVFIRST) {
if (elf_entry)
samples = elf_entry(&adc_samples[0], halfsize);
samples = elf_entry(&adc_samples[halfsize], halfsize);
if (!samples)
samples = &adc_samples[halfsize];
- std::copy(samples, samples + halfsize, &dac_samples[dac_samples.size() / 2]);
+ std::copy(samples, samples + halfsize, &dac_samples[dac_sample_count / 2]);
} else if (message == MSG_CONVFIRST_MEASURE) {
chTMStartMeasurementX(&conversion_time_measurement);
if (elf_entry)
chTMStopMeasurementX(&conversion_time_measurement);
if (!samples)
samples = &adc_samples[halfsize];
- std::copy(samples, samples + halfsize, &dac_samples[dac_samples.size() / 2]);
+ std::copy(samples, samples + halfsize, &dac_samples[dac_sample_count / 2]);
}
}
}
projects / clyne / stmdsp.git / commitdiff