diff options
Diffstat (limited to 'Projects/AVRISP/Lib/PDITarget.c')
| -rw-r--r-- | Projects/AVRISP/Lib/PDITarget.c | 50 |
1 files changed, 23 insertions, 27 deletions
diff --git a/Projects/AVRISP/Lib/PDITarget.c b/Projects/AVRISP/Lib/PDITarget.c index 57a1a29ee..d1042068f 100644 --- a/Projects/AVRISP/Lib/PDITarget.c +++ b/Projects/AVRISP/Lib/PDITarget.c @@ -38,12 +38,16 @@ #define INCLUDE_FROM_PDITARGET_C
#include "PDITarget.h"
+/** Writes a given byte to the attached XMEGA device, using a RS232 frame via software through the
+ * PDI interface.
+ *
+ * \param Byte Byte to send to the attached device
+ */
void PDITarget_SendByte(uint8_t Byte)
{
- PDIDATA_LINE_PORT &= ~PDIDATA_LINE_MASK;
+ PDIDATA_LINE_PORT &= ~PDIDATA_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
+ TOGGLE_PDI_CLOCK;
for (uint8_t i = 0; i < 8; i++)
{
@@ -54,33 +58,28 @@ void PDITarget_SendByte(uint8_t Byte) Byte >>= 1;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
+ TOGGLE_PDI_CLOCK;
}
- PDIDATA_LINE_PORT |= PDIDATA_LINE_MASK;
+ PDIDATA_LINE_PORT |= PDIDATA_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
+ TOGGLE_PDI_CLOCK;
+ TOGGLE_PDI_CLOCK;
}
+/** Reads a given byte from the attached XMEGA device, encoded in a RS232 frame through the PDI interface.
+ *
+ * \return Received byte from the attached device
+ */
uint8_t PDITarget_ReceiveByte(void)
{
uint8_t ReceivedByte = 0;
- PDIDATA_LINE_DDR &= ~PDIDATA_LINE_MASK;
+ PDIDATA_LINE_DDR &= ~PDIDATA_LINE_MASK;
- bool FoundStartBit;
-
- do
- {
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- FoundStartBit = !(PDIDATA_LINE_PIN & PDIDATA_LINE_MASK);
- } while (!FoundStartBit);
-
+ while (PDIDATA_LINE_PIN & PDIDATA_LINE_MASK);
+ TOGGLE_PDI_CLOCK;
+
for (uint8_t i = 0; i < 8; i++)
{
if (PDIDATA_LINE_PIN & PDIDATA_LINE_MASK)
@@ -88,16 +87,13 @@ uint8_t PDITarget_ReceiveByte(void) ReceivedByte <<= 1;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
+ TOGGLE_PDI_CLOCK;
}
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
- PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
+ TOGGLE_PDI_CLOCK;
+ TOGGLE_PDI_CLOCK;
- PDIDATA_LINE_DDR |= PDIDATA_LINE_MASK;
+ PDIDATA_LINE_DDR |= PDIDATA_LINE_MASK;
return ReceivedByte;
}
|