diff options
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/microblaze/apps/txrx_uhd.c | 7 | ||||
| -rw-r--r-- | firmware/microblaze/lib/spi.c | 23 | ||||
| -rw-r--r-- | firmware/microblaze/lib/spi.h | 8 |
3 files changed, 20 insertions, 18 deletions
diff --git a/firmware/microblaze/apps/txrx_uhd.c b/firmware/microblaze/apps/txrx_uhd.c index 6fb01fec2..1dd6e80ac 100644 --- a/firmware/microblaze/apps/txrx_uhd.c +++ b/firmware/microblaze/apps/txrx_uhd.c @@ -194,7 +194,7 @@ void i2c_write_done_callback(void) { static volatile bool spi_done = false; static volatile uint32_t spi_readback_data; void get_spi_readback_data(void) { - spi_readback_data = spi_get_data(); + ctrl_data_out.data.spi_args.data = spi_get_data(); spi_done = true; spi_register_callback(0); } @@ -245,8 +245,6 @@ void handle_udp_ctrl_packet( ******************************************************************/ case USRP2_CTRL_ID_TRANSACT_ME_SOME_SPI_BRO:{ //transact - uint32_t result; - void (*volatile spicall)(void) = (ctrl_data_in->data.spi_args.readback == 0) ? 0 : get_spi_readback_data; //only need a callback if we're doing readback bool success = spi_async_transact( //(ctrl_data_in->data.spi_args.readback == 0)? SPI_TXONLY : SPI_TXRX, ctrl_data_in->data.spi_args.dev, //which device @@ -254,11 +252,10 @@ void handle_udp_ctrl_packet( ctrl_data_in->data.spi_args.num_bits, //length in bits (ctrl_data_in->data.spi_args.mosi_edge == USRP2_CLK_EDGE_RISE)? SPIF_PUSH_FALL : SPIF_PUSH_RISE | //flags (ctrl_data_in->data.spi_args.miso_edge == USRP2_CLK_EDGE_RISE)? SPIF_LATCH_RISE : SPIF_LATCH_FALL, - spicall //callback + get_spi_readback_data //callback ); //load output - ctrl_data_out.data.spi_args.data = result; ctrl_data_out.id = USRP2_CTRL_ID_OMG_TRANSACTED_SPI_DUDE; spi_src = src; } diff --git a/firmware/microblaze/lib/spi.c b/firmware/microblaze/lib/spi.c index 33fcce05f..2a41a1bfa 100644 --- a/firmware/microblaze/lib/spi.c +++ b/firmware/microblaze/lib/spi.c @@ -22,6 +22,8 @@ void (*volatile spi_callback)(void); //SPI callback when xfer complete. +static void spi_irq_handler(unsigned irq); + void spi_init(void) { @@ -68,8 +70,10 @@ void spi_register_callback(void (*volatile callback)(void)) { spi_callback = callback; } -void spi_irq_handler(void) { - printf("SPI IRQ handler\n"); +static void spi_irq_handler(unsigned irq) { +// printf("SPI IRQ handler\n"); +// uint32_t wat = spi_regs->ctrl; //read a register just to clear the interrupt + //spi_regs->ctrl &= ~SPI_CTRL_IE; if(spi_callback) spi_callback(); //we could just use the PIC to register the user's callback, but this provides the ability to do other things later } @@ -80,9 +84,12 @@ uint32_t spi_get_data(void) { bool spi_async_transact(int slave, uint32_t data, int length, uint32_t flags, void (*volatile callback)(void)) { flags &= (SPI_CTRL_TXNEG | SPI_CTRL_RXNEG); - int ctrl = SPI_CTRL_ASS | (SPI_CTRL_CHAR_LEN_MASK & length) | flags; + int ctrl = SPI_CTRL_ASS | SPI_CTRL_IE | (SPI_CTRL_CHAR_LEN_MASK & length) | flags; - if(spi_regs->ctrl & SPI_CTRL_GO_BSY) return false; //we don't wait on busy, we just return failure. + if(spi_regs->ctrl & SPI_CTRL_GO_BSY) { + printf("Async SPI busy!\n"); + return false; //we don't wait on busy, we just return failure. we count on the host to not set up another transaction before the last one finishes. + } // Tell it which SPI slave device to access spi_regs->ss = slave & 0xffff; @@ -90,14 +97,12 @@ spi_async_transact(int slave, uint32_t data, int length, uint32_t flags, void (* // Data we will send spi_regs->txrx0 = data; + spi_register_callback(callback); + pic_register_handler(IRQ_SPI, spi_irq_handler); + // Run it -- write once and rewrite with GO set spi_regs->ctrl = ctrl; spi_regs->ctrl = ctrl | SPI_CTRL_GO_BSY; - spi_regs->ctrl |= SPI_CTRL_IE; //we do these here so that we don't have to start the PIC before the SPI sets up the clocks on startup - pic_register_handler(IRQ_SPI, spi_irq_handler); - - spi_register_callback(callback); - return true; } diff --git a/firmware/microblaze/lib/spi.h b/firmware/microblaze/lib/spi.h index 18699f21a..54618cedd 100644 --- a/firmware/microblaze/lib/spi.h +++ b/firmware/microblaze/lib/spi.h @@ -48,13 +48,13 @@ void spi_wait(void); uint32_t spi_transact(bool readback, int slave, uint32_t data, int length, uint32_t flags); -bool -spi_async_transact(int slave, uint32_t data, int length, uint32_t flags, void (*volatile callback)(void)); - uint32_t spi_get_data(void); -void spi_irq_handler(void); +//static void spi_irq_handler(unsigned irq); void spi_register_callback(void (*volatile callback)(void)); +bool +spi_async_transact(int slave, uint32_t data, int length, uint32_t flags, void (*volatile callback)(void)); + // ---------------------------------------------------------------- // Routines that manipulate the FLASH SPI BUS // ---------------------------------------------------------------- |