Merge pull request #3725 from CNLHC/qspi_mmap

feat: mmap mode for qspi and example

1 files changed, 20 insertions, 0 deletions

diff --git a/embassy-stm32/src/qspi/mod.rs b/embassy-stm32/src/qspi/mod.rs
index 3d5b31815..411e533c9 100644
--- a/embassy-stm32/src/qspi/mod.rs
+++ b/embassy-stm32/src/qspi/mod.rs
@@ -201,6 +201,26 @@ impl<'d, T: Instance, M: PeriMode> Qspi<'d, T, M> {
         T::REGS.fcr().modify(|v| v.set_ctcf(true));
     }
 
+    /// Enable memory map mode
+    pub fn enable_memory_map(&mut self, transaction: &TransferConfig) {
+        T::REGS.fcr().modify(|v| {
+            v.set_csmf(true);
+            v.set_ctcf(true);
+            v.set_ctef(true);
+            v.set_ctof(true);
+        });
+        T::REGS.ccr().write(|v| {
+            v.set_fmode(QspiMode::MemoryMapped.into());
+            v.set_imode(transaction.iwidth.into());
+            v.set_instruction(transaction.instruction);
+            v.set_admode(transaction.awidth.into());
+            v.set_adsize(self.config.address_size.into());
+            v.set_dmode(transaction.dwidth.into());
+            v.set_abmode(QspiWidth::NONE.into());
+            v.set_dcyc(transaction.dummy.into());
+        });
+    }
+
     fn setup_transaction(&mut self, fmode: QspiMode, transaction: &TransferConfig, data_len: Option<usize>) {
         match (transaction.address, transaction.awidth) {
             (Some(_), QspiWidth::NONE) => panic!("QSPI address can't be sent with an address width of NONE"),