Diff: targets/TARGET_NXP/TARGET_LPC81X/spi_api.c

Revision:

168:e84263d55307

Parent:

149:156823d33999

Child:

171:19eb464bc2be

diff -r c97ed07ec1a8 -r e84263d55307 targets/TARGET_NXP/TARGET_LPC81X/spi_api.c
--- a/targets/TARGET_NXP/TARGET_LPC81X/spi_api.c	Thu Jun 08 15:02:37 2017 +0100
+++ b/targets/TARGET_NXP/TARGET_LPC81X/spi_api.c	Wed Jun 21 17:46:44 2017 +0100
@@ -178,6 +178,20 @@
     return ssp_read(obj);
 }
 
+int spi_master_block_write(spi_t *obj, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length) {
+    int total = (tx_length > rx_length) ? tx_length : rx_length;
+
+    for (int i = 0; i < total; i++) {
+        char out = (i < tx_length) ? tx_buffer[i] : 0xff;
+        char in = spi_master_write(obj, out);
+        if (i < rx_length) {
+            rx_buffer[i] = in;
+        }
+    }
+
+    return total;
+}
+
 int spi_slave_receive(spi_t *obj) {
     return (ssp_readable(obj) && !ssp_busy(obj)) ? (1) : (0);
 }