Tsungta Wu
/
mbed_SPIS_multiByte_example_SOG
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mbed_SPIS_multiByte_example_SOG
by 
Sog Yang
Revision 1:58f0712d9aa2, committed 2017-05-31
- Comitter:
- tsungta
- Date:
- Wed May 31 07:39:37 2017 +0000
- Parent:
- 0:b7415ae44dac
- Child:
- 2:c520d7c7739d
- Commit message:
- Able to receive multiple bytes in single CS cycle;
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| spi_api_multibyte.c | Show annotated file Show diff for this revision Revisions of this file |
--- a/main.cpp Wed May 24 10:17:56 2017 +0000
+++ b/main.cpp Wed May 31 07:39:37 2017 +0000
@@ -6,22 +6,13 @@
int main() {
uart.printf("START!");
- device.format(8,1);
-
- device.reply(0xAA); // Prime SPI with first reply
+ device.format(8,1);
+
while(1) {
if(device.receive()) {
int v = device.read(); // Read byte from master
- v = (v + 1) % 0x100; // Add one to it, modulo 256
- device.reply(v); // Make this the next reply
-
- v = device.read(); // Read byte from master
- v = (v + 1) % 0x100; // Add one to it, modulo 256
- device.reply(v); // Make this the next reply
-
- v = device.read(); // Read byte from master
- v = (v + 1) % 0x100; // Add one to it, modulo 256
- device.reply(v); // Make this the next reply
+ uart.printf("v = %s ", v);
+
}
}
}
\ No newline at end of file
--- a/spi_api_multibyte.c Wed May 24 10:17:56 2017 +0000
+++ b/spi_api_multibyte.c Wed May 31 07:39:37 2017 +0000
@@ -80,7 +80,8 @@
#endif
} spi_info_t;
- #define TEST_STRING "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" //Tsungta, handle 32 bytes per SPI CS cycle
+// #define TEST_STRING "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" //Tsungta, handle 32 bytes per SPI CS cycle
+ #define TEST_STRING "012" //Tsungta, handle 32 bytes per SPI CS cycle
uint8_t m_tx_buf[] = TEST_STRING; /**< TX buffer. */
uint8_t m_rx_buf[sizeof(TEST_STRING)+1]; /**< RX buffer. */
const uint8_t m_length = sizeof(m_tx_buf); /**< Transfer length. */
@@ -187,7 +188,8 @@
if (event.evt_type == NRF_DRV_SPIS_XFER_DONE) {
// Signal that there is some data received that could be read.
- p_spi_info->flag.readable = true;
+ if(event.rx_amount == 3)//Tsungta
+ p_spi_info->flag.readable = true;
// And prepare for the next transfer.
// Previous data set in 'spi_slave_write' (if any) has been transmitted,