From 6354a440b24d9a0b157c8c5571403f09dd04c245 Mon Sep 17 00:00:00 2001 From: "Luke T. Shumaker" Date: Sun, 2 Mar 2025 21:16:35 -0700 Subject: libhw: Update comments and asserts about clock rate --- cmd/sbc_harness/main.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'cmd/sbc_harness/main.c') diff --git a/cmd/sbc_harness/main.c b/cmd/sbc_harness/main.c index 6f1d0ca..6fa76bd 100644 --- a/cmd/sbc_harness/main.c +++ b/cmd/sbc_harness/main.c @@ -168,11 +168,11 @@ COROUTINE init_cr(void *) { rp2040_hwspi_init(&globals.dev_spi, "W5500", RP2040_HWSPI_0, SPI_MODE_0, /* the W5500 supports mode 0 or mode 3 */ - 60*1000*1000, /* as close to the W5500's max rate of 80MHz as we can without hwspi borking */ - 16, /* PIN_MISO */ - 19, /* PIN_MOSI */ - 18, /* PIN_CLK */ - 17); /* PIN_CS */ + 31250000, /* min(w5500, hwspi); w5500=80MHz; hwspi=31.25MHz, see rp2040_hwspi.h for a comment about why this is so low */ + 16, /* PIN_MISO */ + 19, /* PIN_MOSI */ + 18, /* PIN_CLK */ + 17);/* PIN_CS */ w5500_init(&globals.dev_w5500, "W5500", lo_box_rp2040_hwspi_as_spi(&globals.dev_spi), 21, /* PIN_INTR */ -- cgit v1.2.3-2-g168b From fb73355711c99003c559df48164a1ce6db93cff9 Mon Sep 17 00:00:00 2001 From: "Luke T. Shumaker" Date: Tue, 4 Mar 2025 00:05:35 -0700 Subject: libhw: rp2040_hwspi: Add more config knobs --- cmd/sbc_harness/main.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'cmd/sbc_harness/main.c') diff --git a/cmd/sbc_harness/main.c b/cmd/sbc_harness/main.c index 6fa76bd..a3351fc 100644 --- a/cmd/sbc_harness/main.c +++ b/cmd/sbc_harness/main.c @@ -169,6 +169,8 @@ COROUTINE init_cr(void *) { rp2040_hwspi_init(&globals.dev_spi, "W5500", RP2040_HWSPI_0, SPI_MODE_0, /* the W5500 supports mode 0 or mode 3 */ 31250000, /* min(w5500, hwspi); w5500=80MHz; hwspi=31.25MHz, see rp2040_hwspi.h for a comment about why this is so low */ + 30, /* W5500 datasheet says min(T_CS = SCSn High Time) = 30ns */ + 0, /* bogus write write data when doing a read */ 16, /* PIN_MISO */ 19, /* PIN_MOSI */ 18, /* PIN_CLK */ -- cgit v1.2.3-2-g168b From c336bf7f2205131c86e6d2991770a2c150d85ca9 Mon Sep 17 00:00:00 2001 From: "Luke T. Shumaker" Date: Mon, 24 Feb 2025 22:54:30 -0700 Subject: libhw: rp2040_hwspi: Use DMA --- cmd/sbc_harness/main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'cmd/sbc_harness/main.c') diff --git a/cmd/sbc_harness/main.c b/cmd/sbc_harness/main.c index a3351fc..8e2c5ee 100644 --- a/cmd/sbc_harness/main.c +++ b/cmd/sbc_harness/main.c @@ -174,7 +174,8 @@ COROUTINE init_cr(void *) { 16, /* PIN_MISO */ 19, /* PIN_MOSI */ 18, /* PIN_CLK */ - 17);/* PIN_CS */ + 17, /* PIN_CS */ + 0, 1, 2, 3); /* DMA channels */ w5500_init(&globals.dev_w5500, "W5500", lo_box_rp2040_hwspi_as_spi(&globals.dev_spi), 21, /* PIN_INTR */ -- cgit v1.2.3-2-g168b From 7a1f764cda070de396fcb186e1f7457ff2704ba4 Mon Sep 17 00:00:00 2001 From: "Luke T. Shumaker" Date: Sun, 2 Mar 2025 23:22:40 -0700 Subject: Bump the CPU clock speed, wring a few more MHz out of the hwspi --- cmd/sbc_harness/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'cmd/sbc_harness/main.c') diff --git a/cmd/sbc_harness/main.c b/cmd/sbc_harness/main.c index 8e2c5ee..c932ec0 100644 --- a/cmd/sbc_harness/main.c +++ b/cmd/sbc_harness/main.c @@ -168,7 +168,7 @@ COROUTINE init_cr(void *) { rp2040_hwspi_init(&globals.dev_spi, "W5500", RP2040_HWSPI_0, SPI_MODE_0, /* the W5500 supports mode 0 or mode 3 */ - 31250000, /* min(w5500, hwspi); w5500=80MHz; hwspi=31.25MHz, see rp2040_hwspi.h for a comment about why this is so low */ + 42500000, /* min(w5500, hwspi); w5500=80MHz; hwspi=42.5MHz, see rp2040_hwspi.h for a comment about why this is so low */ 30, /* W5500 datasheet says min(T_CS = SCSn High Time) = 30ns */ 0, /* bogus write write data when doing a read */ 16, /* PIN_MISO */ -- cgit v1.2.3-2-g168b