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Diffstat (limited to 'src/drivers/ao_cc1120.c')
-rw-r--r--src/drivers/ao_cc1120.c225
1 files changed, 199 insertions, 26 deletions
diff --git a/src/drivers/ao_cc1120.c b/src/drivers/ao_cc1120.c
index 272371d0..95b21170 100644
--- a/src/drivers/ao_cc1120.c
+++ b/src/drivers/ao_cc1120.c
@@ -19,7 +19,7 @@
#include <ao_cc1120.h>
#include <ao_exti.h>
-uint8_t ao_radio_done;
+uint8_t ao_radio_wake;
uint8_t ao_radio_mutex;
uint8_t ao_radio_abort;
@@ -27,6 +27,8 @@ uint8_t ao_radio_abort;
uint32_t ao_radio_cal = 1186611;
+#define FOSC 32000000
+
#define ao_radio_select() ao_spi_get_mask(AO_CC1120_SPI_CS_PORT,(1 << AO_CC1120_SPI_CS_PIN),AO_CC1120_SPI_BUS)
#define ao_radio_deselect() ao_spi_put_mask(AO_CC1120_SPI_CS_PORT,(1 << AO_CC1120_SPI_CS_PIN),AO_CC1120_SPI_BUS)
#define ao_radio_spi_send(d,l) ao_spi_send((d), (l), AO_CC1120_SPI_BUS)
@@ -41,7 +43,7 @@ ao_radio_reg_read(uint16_t addr)
uint8_t d;
#if CC1120_DEBUG
- printf("ao_radio_reg_read (%04x): ", addr); flush();
+ printf("\t\tao_radio_reg_read (%04x): ", addr); flush();
#endif
if (CC1120_IS_EXTENDED(addr)) {
data[0] = ((1 << CC1120_READ) |
@@ -72,7 +74,7 @@ ao_radio_reg_write(uint16_t addr, uint8_t value)
uint8_t d;
#if CC1120_DEBUG
- printf("ao_radio_reg_write (%04x): %02x\n", addr, value);
+ printf("\t\tao_radio_reg_write (%04x): %02x\n", addr, value);
#endif
if (CC1120_IS_EXTENDED(addr)) {
data[0] = ((1 << CC1120_READ) |
@@ -97,9 +99,15 @@ ao_radio_strobe(uint8_t addr)
{
uint8_t in;
+#if CC1120_DEBUG
+ printf("\t\tao_radio_strobe (%02x): ", addr); flush();
+#endif
ao_radio_select();
ao_radio_duplex(&addr, &in, 1);
ao_radio_deselect();
+#if CC1120_DEBUG
+ printf("%02x\n", in);
+#endif
return in;
}
@@ -141,10 +149,12 @@ ao_radio_fifo_write_fixed(uint8_t data, uint8_t len)
CC1120_FIFO);
uint8_t status;
+ printf ("num tx bytes: %d\n", ao_radio_reg_read(CC1120_NUM_TXBYTES));
ao_radio_select();
ao_radio_duplex(&addr, &status, 1);
ao_radio_spi_send_fixed(data, len);
ao_radio_deselect();
+ printf ("num tx bytes: %d\n", ao_radio_reg_read(CC1120_NUM_TXBYTES));
return status;
}
@@ -158,32 +168,116 @@ void
ao_radio_recv_abort(void)
{
ao_radio_abort = 1;
- ao_wakeup(&ao_radio_done);
+ ao_wakeup(&ao_radio_wake);
}
#define ao_radio_rdf_value 0x55
-static const uint16_t rdf_setup[] = {
+/*
+ * RDF deviation is 5kHz
+ *
+ * fdev = fosc >> 24 * (256 + dev_m) << dev_e
+ *
+ * 32e6Hz / (2 ** 24) * (256 + 71) * (2 ** 3) = 4989
+ */
+
+#define RDF_DEV_E 3
+#define RDF_DEV_M 71
+#define RDF_PACKET_LEN 50
+
+/*
+ * For our RDF beacon, set the symbol rate to 2kBaud (for a 1kHz tone)
+ *
+ * (2**20 - DATARATE_M) * 2 ** DATARATE_E
+ * Rdata = -------------------------------------- * fosc
+ * 2 ** 39
+ *
+ * DATARATE_M = 511705
+ * DATARATE_E = 6
+ *
+ * To make the tone last for 200ms, we need 2000 * .2 = 400 bits or 50 bytes
+ */
+#define RDF_DRATE_E 6
+#define RDF_DRATE_M 511705
+#define RDF_PACKET_LEN 50
+
+static const uint16_t rdf_setup[] = {
+ CC1120_DEVIATION_M, RDF_DEV_M,
+ CC1120_MODCFG_DEV_E, ((CC1120_MODCFG_DEV_E_MODEM_MODE_NORMAL << CC1120_MODCFG_DEV_E_MODEM_MODE) |
+ (CC1120_MODCFG_DEV_E_MOD_FORMAT_2_GFSK << CC1120_MODCFG_DEV_E_MOD_FORMAT) |
+ (RDF_DEV_E << CC1120_MODCFG_DEV_E_DEV_E)),
+ CC1120_DRATE2, ((RDF_DRATE_E << CC1120_DRATE2_DATARATE_E) |
+ (((RDF_DRATE_M >> 16) & CC1120_DRATE2_DATARATE_M_19_16_MASK) << CC1120_DRATE2_DATARATE_M_19_16)),
+ CC1120_DRATE1, ((RDF_DRATE_M >> 8) & 0xff),
+ CC1120_DRATE0, ((RDF_DRATE_M >> 0) & 0xff),
+ CC1120_PKT_CFG2, ((CC1120_PKT_CFG2_CCA_MODE_ALWAYS_CLEAR << CC1120_PKT_CFG2_CCA_MODE) |
+ (CC1120_PKT_CFG2_PKT_FORMAT_NORMAL << CC1120_PKT_CFG2_PKT_FORMAT)),
+ CC1120_PKT_CFG1, ((0 << CC1120_PKT_CFG1_WHITE_DATA) |
+ (CC1120_PKT_CFG1_ADDR_CHECK_CFG_NONE << CC1120_PKT_CFG1_ADDR_CHECK_CFG) |
+ (CC1120_PKT_CFG1_CRC_CFG_DISABLED << CC1120_PKT_CFG1_CRC_CFG) |
+ (0 << CC1120_PKT_CFG1_APPEND_STATUS)),
};
+#define int_pin(w) printf("\t%s: %d\n", \
+ w,\
+ (AO_CC1120_INT_PORT.idr >> AO_CC1120_INT_PIN) & 1)
+
+static uint8_t
+ao_radio_marc_status(void)
+{
+ return ao_radio_reg_read(CC1120_MARC_STATUS1);
+}
+
+static uint8_t
+ao_radio_tx_done(void)
+{
+ return ao_radio_marc_status() == CC1120_MARC_STATUS1_TX_FINISHED;
+}
+
+static uint8_t
+ao_radio_rx_done(void)
+{
+ return ao_radio_marc_status() == CC1120_MARC_STATUS1_RX_FINISHED;
+}
+
void
ao_radio_rdf(uint8_t len)
{
int i;
- ao_radio_abort = 0;
ao_radio_get(len);
- ao_radio_done = 0;
+ ao_radio_abort = 0;
for (i = 0; i < sizeof (rdf_setup) / sizeof (rdf_setup[0]); i += 2)
ao_radio_reg_write(rdf_setup[i], rdf_setup[i+1]);
- ao_radio_fifo_write_fixed(ao_radio_rdf_value, len);
+ ao_radio_reg_write(CC1120_PKT_LEN, len);
+ int_pin ("Before CFG");
ao_radio_reg_write(CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_RX0TX1_CFG);
- ao_exti_enable(&AO_CC1120_INT_PORT, AO_CC1120_INT_PIN);
+ int_pin ("After CFG");
ao_radio_strobe(CC1120_STX);
+ ao_exti_enable(&AO_CC1120_INT_PORT, AO_CC1120_INT_PIN);
+ int_pin ("After strobe");
+ ao_delay(AO_MS_TO_TICKS(100));
+ ao_radio_fifo_write_fixed(ao_radio_rdf_value, len);
+ int_pin ("After delay");
cli();
- while (!ao_radio_done)
- ao_sleep(&ao_radio_done);
+ for (i = 0; i < 20; i++) {
+#if CC1120_DEBUG
+ ao_delay(AO_MS_TO_TICKS(50));
+ int_pin ("Waited");
+ printf ("Status %02x num_tx_bytes %d marc status %x\n",
+ ao_radio_status(),
+ ao_radio_reg_read(CC1120_NUM_TXBYTES),
+ ao_radio_marc_status());
+#else
+ ao_sleep(&ao_radio_wake);
+#endif
+ }
sei();
+ printf ("num_tx_bytes %d marc status %x\n",
+ ao_radio_reg_read(CC1120_NUM_TXBYTES),
+ ao_radio_marc_status());
+ if (!ao_radio_tx_done())
+ ao_radio_idle();
ao_radio_set_packet();
ao_radio_put();
}
@@ -191,6 +285,8 @@ ao_radio_rdf(uint8_t len)
void
ao_radio_rdf_abort(void)
{
+ ao_radio_abort = 1;
+ ao_wakeup(&ao_radio_wake);
}
static void
@@ -213,6 +309,14 @@ ao_radio_test(void)
#endif
ao_radio_get(0xff);
ao_radio_strobe(CC1120_STX);
+#if CC1120_DEBUG
+ { int t;
+ for (t = 0; t < 10; t++) {
+ printf ("status: %02x\n", ao_radio_status());
+ ao_delay(AO_MS_TO_TICKS(100));
+ }
+ }
+#endif
radio_on = 1;
}
if (mode == 3) {
@@ -233,15 +337,23 @@ ao_radio_test(void)
void
ao_radio_send(void *d, uint8_t size)
{
+ uint8_t marc_status;
+
ao_radio_get(size);
- ao_radio_done = 0;
+ ao_radio_wake = 0;
ao_radio_fifo_write(d, size);
- ao_radio_reg_write(CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_RX0TX1_CFG);
ao_exti_enable(&AO_CC1120_INT_PORT, AO_CC1120_INT_PIN);
ao_radio_strobe(CC1120_STX);
cli();
- while (!ao_radio_done)
- ao_sleep(&ao_radio_done);
+ for (;;) {
+ if (ao_radio_wake) {
+ marc_status = ao_radio_marc_status();
+ if (marc_status != CC1120_MARC_STATUS1_NO_FAILURE)
+ break;
+ ao_radio_wake = 0;
+ }
+ ao_sleep(&ao_radio_wake);
+ }
sei();
ao_radio_put();
}
@@ -249,23 +361,73 @@ ao_radio_send(void *d, uint8_t size)
uint8_t
ao_radio_recv(__xdata void *d, uint8_t size)
{
+ uint8_t marc_status = CC1120_MARC_STATUS1_NO_FAILURE;
+
/* configure interrupt pin */
ao_radio_get(size);
- ao_radio_done = 0;
- ao_radio_reg_write(CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_RXFIFO_THR_PKT);
+ ao_radio_wake = 0;
ao_exti_enable(&AO_CC1120_INT_PORT, AO_CC1120_INT_PIN);
ao_radio_strobe(CC1120_SRX);
cli();
- while (!ao_radio_done && !ao_radio_abort)
- ao_sleep(&ao_radio_done);
+ for (;;) {
+ if (ao_radio_abort)
+ break;
+ if (ao_radio_wake) {
+ marc_status = ao_radio_marc_status();
+ if (marc_status != CC1120_MARC_STATUS1_NO_FAILURE)
+ break;
+ ao_radio_wake = 0;
+ }
+ ao_sleep(&ao_radio_wake);
+ }
sei();
- if (ao_radio_done)
+ if (marc_status != CC1120_MARC_STATUS1_RX_FINISHED)
ao_radio_fifo_read(d, size);
ao_radio_put();
- return 0;
+ return marc_status == CC1120_MARC_STATUS1_RX_FINISHED;
}
+/*
+ * Packet deviation is 20.5kHz
+ *
+ * fdev = fosc >> 24 * (256 + dev_m) << dev_e
+ *
+ * 32e6Hz / (2 ** 24) * (256 + 80) * (2 ** 5) = 20508Hz
+ */
+
+#define PACKET_DEV_E 5
+#define PACKET_DEV_M 80
+
+/*
+ * For our packet data, set the symbol rate to 38360 Baud
+ *
+ * (2**20 - DATARATE_M) * 2 ** DATARATE_E
+ * Rdata = -------------------------------------- * fosc
+ * 2 ** 39
+ *
+ * DATARATE_M = 405002
+ * DATARATE_E = 10
+ *
+ * To make the tone last for 200ms, we need 2000 * .2 = 400 bits or 50 bytes
+ */
+#define PACKET_DRATE_E 10
+#define PACKET_DRATE_M 405002
+
static const uint16_t packet_setup[] = {
+ CC1120_DEVIATION_M, PACKET_DEV_M,
+ CC1120_MODCFG_DEV_E, ((CC1120_MODCFG_DEV_E_MODEM_MODE_NORMAL << CC1120_MODCFG_DEV_E_MODEM_MODE) |
+ (CC1120_MODCFG_DEV_E_MOD_FORMAT_2_GFSK << CC1120_MODCFG_DEV_E_MOD_FORMAT) |
+ (PACKET_DEV_E << CC1120_MODCFG_DEV_E_DEV_E)),
+ CC1120_DRATE2, ((PACKET_DRATE_E << CC1120_DRATE2_DATARATE_E) |
+ (((PACKET_DRATE_M >> 16) & CC1120_DRATE2_DATARATE_M_19_16_MASK) << CC1120_DRATE2_DATARATE_M_19_16)),
+ CC1120_DRATE1, ((PACKET_DRATE_M >> 8) & 0xff),
+ CC1120_DRATE0, ((PACKET_DRATE_M >> 0) & 0xff),
+ CC1120_PKT_CFG2, ((CC1120_PKT_CFG2_CCA_MODE_ALWAYS_CLEAR << CC1120_PKT_CFG2_CCA_MODE) |
+ (CC1120_PKT_CFG2_PKT_FORMAT_NORMAL << CC1120_PKT_CFG2_PKT_FORMAT)),
+ CC1120_PKT_CFG1, ((1 << CC1120_PKT_CFG1_WHITE_DATA) |
+ (CC1120_PKT_CFG1_ADDR_CHECK_CFG_NONE << CC1120_PKT_CFG1_ADDR_CHECK_CFG) |
+ (CC1120_PKT_CFG1_CRC_CFG_DISABLED << CC1120_PKT_CFG1_CRC_CFG) |
+ (1 << CC1120_PKT_CFG1_APPEND_STATUS)),
};
void
@@ -285,6 +447,8 @@ ao_radio_idle(void)
if ((state >> CC1120_STATUS_STATE) == CC1120_STATUS_STATE_IDLE)
break;
}
+ ao_radio_strobe(CC1120_SFTX);
+ ao_radio_strobe(CC1120_SFRX);
}
static const uint16_t radio_setup[] = {
@@ -297,8 +461,8 @@ static void
ao_radio_isr(void)
{
ao_exti_disable(&AO_CC1120_INT_PORT, AO_CC1120_INT_PIN);
- ao_radio_done = 1;
- ao_wakeup(&ao_radio_done);
+ ao_radio_wake = 1;
+ ao_wakeup(&ao_radio_wake);
}
static void
@@ -306,15 +470,17 @@ ao_radio_setup(void)
{
int i;
+ ao_radio_strobe(CC1120_SRES);
+
for (i = 0; i < sizeof (radio_setup) / sizeof (radio_setup[0]); i += 2)
ao_radio_reg_write(radio_setup[i], radio_setup[i+1]);
- /* Disable GPIO2 pin (radio_int) */
- ao_radio_reg_write(CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_HIGHZ);
+ /* Enable marc status interrupt on gpio 2 pin */
+ ao_radio_reg_write(CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_MARC_MCU_WAKEUP);
/* Enable the EXTI interrupt for the appropriate pin */
ao_enable_port(AO_CC1120_INT_PORT);
- ao_exti_setup(&AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, AO_EXTI_MODE_RISING, ao_radio_isr);
+ ao_exti_setup(&AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, AO_EXTI_MODE_FALLING, ao_radio_isr);
ao_radio_set_packet();
ao_radio_configured = 1;
@@ -534,17 +700,24 @@ static void ao_radio_show(void) {
printf ("Status: %02x\n", status);
printf ("CHIP_RDY: %d\n", (status >> CC1120_STATUS_CHIP_RDY) & 1);
printf ("STATE: %s\n", cc1120_state_name[(status >> CC1120_STATUS_STATE) & CC1120_STATUS_STATE_MASK]);
+ printf ("MARC: %02x\n", ao_radio_marc_status());
for (i = 0; i < AO_NUM_CC1120_REG; i++)
printf ("\t%02x %-20.20s\n", ao_radio_reg_read(ao_cc1120_reg[i].addr), ao_cc1120_reg[i].name);
ao_radio_put();
}
+
+static void ao_radio_beep(void) {
+ ao_radio_rdf(120);
+}
+
#endif
static const struct ao_cmds ao_radio_cmds[] = {
{ ao_radio_test, "C <1 start, 0 stop, none both>\0Radio carrier test" },
#if CC1120_DEBUG
{ ao_radio_show, "R\0Show CC1120 status" },
+ { ao_radio_beep, "B\0Emit an RDF beacon" },
#endif
{ 0, NULL }
};
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-31 17:46:32 +0000