New cleaned-up (and then messed up again) SSC code

Better layering separation


git-svn-id: https://svn.openpcd.org:2342/trunk@434 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

1 files changed, 46 insertions, 0 deletions

diff --git a/openpicc/application/ssc_buffer.h b/openpicc/application/ssc_buffer.h
new file mode 100644
index 0000000..fdb977f
--- /dev/null
+++ b/openpicc/application/ssc_buffer.h
@@ -0,0 +1,46 @@
+#ifndef SSC_BUFFER_H_
+#define SSC_BUFFER_H_
+
+#define SSC_RX_BUFFER_SIZE_AS_UINT8 2048
+#define SSC_DMA_BUFFER_COUNT 4
+
+#if SSC_RX_BUFFER_SIZE_AS_UINT8 < DIV_ROUND_UP((ISO14443A_MAX_RX_FRAME_SIZE_IN_BITS*ISO14443A_SAMPLE_LEN),8)
+#undef SSC_RX_BUFFER_SIZE_AS_UINT8
+#define SSC_RX_BUFFER_SIZE_AS_UINT8 DIV_ROUND_UP((ISO14443A_MAX_RX_FRAME_SIZE_IN_BITS*ISO14443A_SAMPLE_LEN),8)
+#endif
+
+typedef enum {
+	FREE=0,    /* Buffer is free */
+	PENDING,   /* Buffer has been given to the DMA controller and is currently being filled */
+	FULL,      /* DMA controller signalled that the buffer is full */
+	PROCESSING,/* The buffer is currently processed by the consumer (e.g. decoder) */
+	PREFILLED, /* The buffer has been prefilled for later usage (only used for TX) */
+} ssc_dma_buffer_state_t;
+
+enum ssc_mode {
+	SSC_MODE_NONE,
+	SSC_MODE_14443A,
+};
+
+typedef struct {
+	enum ssc_mode mode;
+	u_int16_t transfersize_ssc;
+	u_int16_t transfersize_pdc;
+	u_int16_t transfers;
+} ssc_mode_def;
+
+typedef struct {
+	volatile ssc_dma_buffer_state_t state;
+	u_int32_t len_transfers;            /* Length of the content, in transfers */
+	struct {
+		int overflow:1;
+	} flags;
+	const ssc_mode_def *reception_mode; /* Pointer to the SSC mode definition that the buffer has been loaded for (affects element size and count) */
+	u_int8_t data[SSC_RX_BUFFER_SIZE_AS_UINT8];
+} ssc_dma_rx_buffer_t;
+
+
+typedef struct {
+} ssc_dma_tx_buffer_t;
+
+#endif /*SSC_BUFFER_H_*/