FlapJackApps/libdc
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Reduced the amount of duplicated code.

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This commit is contained in:
Jef Driesen 2007-11-16 13:34:13 +00:00
parent 7f158ff8f6
commit 8f4ebf434c
1 changed files with 38 additions and 68 deletions
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106
suunto_vyper.c
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@ -207,7 +207,7 @@ suunto_vyper_detect_interface (vyper *device)
static int
suunto_vyper_send_command (vyper *device, const unsigned char* data, unsigned int size)
suunto_vyper_send (vyper *device, const unsigned char command[], unsigned int csize)
{
serial_sleep (500);
@ -216,7 +216,7 @@ suunto_vyper_send_command (vyper *device, const unsigned char* data, unsigned in
// Send the command to the dive computer and
// wait until all data has been transmitted.
serial_write (device->port, data, size);
serial_write (device->port, command, csize);
serial_drain (device->port);
// If the interface sends an echo back (which is the case for many clone
@ -239,18 +239,10 @@ suunto_vyper_send_command (vyper *device, const unsigned char* data, unsigned in
static int
suunto_vyper_read_memory_package (vyper *device, unsigned int address, unsigned char data[], unsigned int size)
suunto_vyper_transfer (vyper *device, const unsigned char command[], unsigned int csize, unsigned char header[], unsigned int hsize, unsigned char data[], unsigned int size)
{
// Prepare the command.
unsigned char command[5] = {0x05,
(address >> 8) & 0xFF, // high
(address ) & 0xFF, // low
size, // count
0x00}; // CRC
command[4] = suunto_vyper_checksum (command, 4, 0x00);
// Send the command to the dive computer.
int rc = suunto_vyper_send_command (device, command, 5);
int rc = suunto_vyper_send (device, command, csize);
if (rc != SUUNTO_VYPER_SUCCESS) {
WARNING ("Failed to send the command.");
return rc;
@ -260,14 +252,13 @@ suunto_vyper_read_memory_package (vyper *device, unsigned int address, unsigned
// then let the standard timeout apply.
// Receive the header of the package.
unsigned char reply[4] = {0, 0, 0, 0};
rc = serial_read (device->port, reply, 4);
if (rc != 4 || memcmp (command, reply, 4) != 0) {
rc = serial_read (device->port, header, hsize);
if (rc != hsize || memcmp (command, header, hsize) != 0) {
WARNING ("Unexpected answer start byte(s).");
if (rc == 0) {
WARNING ("Interface present, but the DC does not answer. Check the connection.");
}
return EXITCODE (rc, 4);
return EXITCODE (rc, hsize);
}
// Receive the contents of the package.
@ -279,7 +270,7 @@ suunto_vyper_read_memory_package (vyper *device, unsigned int address, unsigned
// Calculate the checksum.
unsigned char ccrc = 0x00;
ccrc = suunto_vyper_checksum (reply, 4, ccrc);
ccrc = suunto_vyper_checksum (header, hsize, ccrc);
ccrc = suunto_vyper_checksum (data, size, ccrc);
// Receive (and verify) the checksum of the package.
@ -290,6 +281,27 @@ suunto_vyper_read_memory_package (vyper *device, unsigned int address, unsigned
return EXITCODE (rc, 1);
}
return SUUNTO_VYPER_SUCCESS;
}
static int
suunto_vyper_read_memory_package (vyper *device, unsigned int address, unsigned char data[], unsigned int size)
{
// Prepare the command.
unsigned char header[4] = {0};
unsigned char command[5] = {0x05,
(address >> 8) & 0xFF, // high
(address ) & 0xFF, // low
size, // count
0x00}; // CRC
command[4] = suunto_vyper_checksum (command, 4, 0x00);
// Send the command to the dive computer and receive the answer.
int rc = suunto_vyper_transfer (device, command, 5, header, 4, data, size);
if (rc != SUUNTO_VYPER_SUCCESS)
return rc;
#ifndef NDEBUG
printf ("VyperRead(0x%04x,%d)=\"", (command[1] << 8) | command[2], command[3]);
for (unsigned int i = 0; i < size; ++i) {
@ -306,29 +318,14 @@ static int
suunto_vyper_write_memory_prepare (vyper *device)
{
// Prepare the commmand.
unsigned char header[2] = {0};
unsigned char command[3] = {0x07, 0xA5, 0x00};
command[2] = suunto_vyper_checksum (command, 2, 0x00);
// Send the command to the dive computer.
int rc = suunto_vyper_send_command (device, command, 3);
if (rc != SUUNTO_VYPER_SUCCESS) {
WARNING ("Failed to send the command.");
// Send the command to the dive computer and receive the answer.
int rc = suunto_vyper_transfer (device, command, 3, header, 2, NULL, 0);
if (rc != SUUNTO_VYPER_SUCCESS)
return rc;
}
// FIXME: Give the DC extra answer time to send its first byte,
// then let the standard timeout apply.
// Receive the header of the package.
unsigned char reply[3] = {0, 0, 0};
rc = serial_read (device->port, reply, 3);
if (rc != 3 || memcmp (command, reply, 3) != 0) {
WARNING ("Unexpected answer start byte(s).");
if (rc == 0) {
WARNING ("Interface present, but the DC does not answer. Check the connection.");
}
return EXITCODE (rc, 3);
}
#ifndef NDEBUG
printf("VyperPrepareWrite();\n");
@ -342,6 +339,7 @@ static int
suunto_vyper_write_memory_package (vyper *device, int address, const unsigned char data[], unsigned int size)
{
// Prepare the command.
unsigned char header[4] = {0};
unsigned char command[SUUNTO_VYPER_PACKET_SIZE + 5] = {0x06,
(address >> 8) & 0xFF, // high
(address ) & 0xFF, // low
@ -350,38 +348,10 @@ suunto_vyper_write_memory_package (vyper *device, int address, const unsigned ch
memcpy (command + 4, data, size);
command[size + 4] = suunto_vyper_checksum (command, size + 4, 0x00);
// Send the command to the dive computer.
int rc = suunto_vyper_send_command (device, command, size + 5);
if (rc != SUUNTO_VYPER_SUCCESS) {
WARNING ("Failed to send the command.");
// Send the command to the dive computer and receive the answer.
int rc = suunto_vyper_transfer (device, command, size + 5, header, 4, NULL, 0);
if (rc != SUUNTO_VYPER_SUCCESS)
return rc;
}
// FIXME: Give the DC extra answer time to send its first byte,
// then let the standard timeout apply.
// Receive the header of the package.
unsigned char reply[4] = {0, 0, 0, 0};
rc = serial_read (device->port, reply, 4);
if (rc != 4 || memcmp (command, reply, 4) != 0) {
WARNING ("Unexpected answer start byte(s).");
if (rc == 0) {
WARNING ("Interface present, but the DC does not answer. Check the connection.");
}
return EXITCODE (rc, 4);
}
// Calculate the checksum.
unsigned char ccrc = 0x00;
ccrc = suunto_vyper_checksum (reply, 4, ccrc);
// Receive (and verify) the checksum of the package.
unsigned char crc = 0x00;
rc = serial_read (device->port, &crc, 1);
if (rc != 1 || ccrc != crc) {
WARNING ("Unexpected answer CRC.");
return EXITCODE (rc, 1);
}
#ifndef NDEBUG
printf ("VyperWrite(0x%04x,%d,\"", (command[1] << 8) | command[2], command[3]);
@ -465,7 +435,7 @@ suunto_vyper_read_dive (vyper *device, unsigned char data[], unsigned int size,
command[2] = suunto_vyper_checksum (command, 2, 0x00);
// Send the command to the dive computer.
int rc = suunto_vyper_send_command (device, command, 3);
int rc = suunto_vyper_send (device, command, 3);
if (rc != SUUNTO_VYPER_SUCCESS) {
WARNING ("Failed to send the command.");
return rc;