feat: Add spi support for STM32F1 variants

3 files changed, 17 insertions, 2 deletions

diff --git a/embassy-stm32/src/spi/mod.rs b/embassy-stm32/src/spi/mod.rs
index 6249de84e..808854f00 100644
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@@ -1,6 +1,7 @@
 #![macro_use]
 
 #[cfg_attr(spi_v1, path = "v1.rs")]
+#[cfg_attr(spi_f1, path = "v1.rs")]
 #[cfg_attr(spi_v2, path = "v2.rs")]
 #[cfg_attr(spi_v3, path = "v3.rs")]
 mod _version;
diff --git a/embassy-stm32/src/spi/v1.rs b/embassy-stm32/src/spi/v1.rs
index 53d8252e6..982f1cc4b 100644
--- a/embassy-stm32/src/spi/v1.rs
+++ b/embassy-stm32/src/spi/v1.rs
@@ -414,7 +414,7 @@ fn write_word<W: Word>(regs: &'static crate::pac::spi::Spi, word: W) -> Result<(
         let sr = unsafe { regs.sr().read() };
         if sr.ovr() {
             return Err(Error::Overrun);
-        } else if sr.fre() {
+        } else if sr_fre(sr) {
             return Err(Error::Framing);
         } else if sr.modf() {
             return Err(Error::ModeFault);
@@ -438,7 +438,7 @@ fn read_word<W: Word>(regs: &'static crate::pac::spi::Spi) -> Result<W, Error> {
             return Err(Error::Overrun);
         } else if sr.modf() {
             return Err(Error::ModeFault);
-        } else if sr.fre() {
+        } else if sr_fre(sr) {
             return Err(Error::Framing);
         } else if sr.crcerr() {
             return Err(Error::Crc);
@@ -450,3 +450,17 @@ fn read_word<W: Word>(regs: &'static crate::pac::spi::Spi) -> Result<W, Error> {
         }
     }
 }
+
+// SPI on F1 is just V1 without FRE and FRF fields
+// This driver only uses FRE, so add a simple function here to read fre on v1,
+// and return false on f1
+
+#[cfg(spi_v1)]
+fn sr_fre(sr: crate::pac::spi::regs::Sr) -> bool {
+    sr.fre()
+}
+
+#[cfg(spi_f1)]
+fn sr_fre(_sr: crate::pac::spi::regs::Sr) -> bool {
+    false
+}
diff --git a/stm32-data b/stm32-data
-Subproject e78ea6f05058dc1eff1dd4a4f07227d502a3b65
+Subproject bae2d34445f87e7b9a88b683c789c5d0c7560fb